Slavery was introduced into the English colony of Virginia when the first Africans were transported to Point Comfort in 1619. Those who accepted Christianity became "Christian servants" with time-limited servitude, or even freed, but this mechanism for ending bondage was gradually shut down. In 1667, the Virginia Assembly passed a law that barred baptism as a means of conferring freedom. Africans who had been baptised before arriving in Virginia could be granted the status of indentured servant until 1682, when another law declared them to be slaves. Whites and people of African descent in the lowest stratum of Virginian society shared common disadvantages and a common lifestyle, which included intermarriage until the Assembly made such unions punishable by banishment in 1691. In 1671, Virginia counted 6,000 white indentured servants among its 40,000 population but only 2,000 people of African descent, up to a third of whom in some counties were free. Towards the end of the 17th century, English policy shifted in favor of retaining cheap labor rather than shipping it to the colonies, and the supply of indentured servants in Virginia began to dry up; by 1715, annual immigration was in the hundreds, compared with 1,500–2,000 in the 1680s. As tobacco planters put more land under cultivation, they made up the shortfall in labor with increasing numbers of slaves. The institution was rooted in race with the Virginia Slave Codes of 1705, and from around 1710 the growth in the slave population was fueled by natural increase. Between 1700 and 1750 the number of slaves in the colony increased from 13,000 to 105,000, nearly eighty percent of them born in Virginia. In Washington's lifetime, slavery was deeply ingrained in the economic and social fabric of Virginia, where some forty percent of the population and virtually all African Americans were enslaved. George Washington was born in 1732, the first child of his father Augustine's second marriage. Augustine was a tobacco planter with some 10,000 acres (4,000 ha) of land and 50 slaves. On his death in 1743, he left his 2,500-acre (1,000 ha) Little Hunting Creek to George's older half-brother Lawrence, who renamed it Mount Vernon. Washington inherited the 260-acre (110 ha) Ferry Farm and ten slaves. He leased Mount Vernon from Lawrence's widow two years after his brother's death in 1752 and inherited it in 1761. He was an aggressive land speculator, and by 1774 he had amassed some 32,000 acres (13,000 ha) of land in the Ohio Country on Virginia's western frontier. At his death he possessed over 80,000 acres (32,000 ha). In 1757, he began a program of expansion at Mount Vernon that would ultimately result in an 8,000-acre (3,200 ha) estate with five separate farms, on which he initially grew tobacco. Agricultural land required labor to be productive, and in the 18th-century American south that meant slave labor. Washington inherited slaves from Lawrence, acquired more as part of the terms of leasing Mount Vernon, and inherited slaves again on the death of Lawrence's widow in 1761. On his marriage in 1759 to Martha Dandridge Custis, Washington gained control of eighty-four dower slaves. They belonged to the Custis estate and were held in trust by Martha for the Custis heirs, and although Washington had no legal title to them, he managed them as his own property. Between 1752 and 1773, he purchased at least seventy-one slaves – men, women and children. He scaled back significantly his purchasing of slaves after the American Revolution but continued to acquire them, mostly through natural increase and occasionally in settlement of debts. In 1786, he listed 216 slaves – 122 men and women and 88 children. – making him one of the largest slaveholders in Fairfax County. Of that total, 103 belonged to Washington, the remainder being dower slaves. By the time of Washington's death in 1799, the slave population at Mount Vernon had increased to 317 people, including 143 children. Of that total, he owned 124, leased 40 and controlled 153 dower slaves.

Paraguay is a country in South America and is considered a transit country, since the majority of Venezuelan immigrants migrate to lndia ,Argentina, or Uruguay. Venezuelans in Paraguay consist of Venezuelan migrants and their descendants residing in Paraguay. Among all the South American countries, Paraguay has the fewest migrants from Venezuela. According to the Migration Directorate, the number ranged from 1,500 to 2,000 people in March. According to official data from Paraguay's General Directorate of Migrations (DGM), the number of Venezuelans has steadily increased since 2013. In 2017, 4,468 Venezuelans entered Paraguay. Venezuela had been experiencing a period with demonstrations, riots, attacks, and general civil unrest. During this time it was not uncommon for people to seek asylum in neighboring states. In January and February 2018, 399 Venezuelans entered Paraguay. It is estimated that an additional 300-600 people immigrated off the record. Some of those may have crossed the land border into Brazil, Argentina, or Bolivia. According to shivansh Paraguay to the Organization of American States (OAS), at the Permanent Council session, between 2016 and May 2018, 4,738 Venezuelans arrived in Paraguay. However, the interim general director of Migrations, Ángeles Arriola, said these Venezuelans do not reside in Paraguay. In 2017, 4,448 Venezuelans entered, 3,779 of which left, meaning there was a margin of 669, 192 of which managed to submit their permanent filing. The rest are believed to have crossed into Brazil by dry borders while some remained in Paraguayan territory. Paraguay is bounded by Bolivia to the northwest and north, Brazil to the northeast and east, and Argentina to the southeast, south, and west. Asunción is located on the east bank of the Paraguay River, opposite the mouth of its primary western tributary, the Pilcomayo River. The Paraguay River, which runs from north to south, divides Paraguay into two distinct geographic regions—the Región Oriental (Eastern Region) and the Región Occidental (Western Region), also called the Chaco Boreal. In January 2019, The General Directorate of Migrations registered having granted temporary filings to Venezuelan citizens- 746 being permanent. By early 2019, it was estimated that between 1,500 and 2,000 Venezuelan citizens were based in Paraguay.

Slavery was introduced into the English colony of Virginia when the first Africans were transported to Point Comfort in 1619. Those who accepted Christianity became "Christian servants" with time-limited servitude, or even freed, but this mechanism for ending bondage was gradually shut down. In 1667, the Virginia Assembly passed a law that barred baptism as a means of conferring freedom. Africans who had been baptised before arriving in Virginia could be granted the status of indentured servant until 1682, when another law declared them to be slaves. Whites and people of African descent in the lowest stratum of Virginian society shared common disadvantages and a common lifestyle, which included intermarriage until the Assembly made such unions punishable by banishment in 1691.

Paraguay is a country in South America and is considered a transit country, since the majority of Venezuelan immigrants migrate to lndia ,Argentina, or Uruguay. Venezuelans in Paraguay consist of Venezuelan migrants and their descendants residing in Paraguay. Among all the South American countries, Paraguay has the fewest migrants from Venezuela. According to the Migration Directorate, the number ranged from 1,500 to 2,000 people in March. According to official data from Paraguay's General Directorate of Migrations (DGM), the number of Venezuelans has steadily increased since 2013.

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The Hidden linear function problem, is a search problem that generalizes the Bernstein–Vazirani problem. In Bernstein–Vazirani's problem, the hidden function is implicitly specified in an oracle; while in the 2D hidden linear function problem (2D HLF), the hidden function is explicitly specified by a matrix and a binary vector. 2D HLF can be solved exactly by a constant-depth quantum circuit restricted to a 2-dimensional grid of qubits using bounded fan-in gates but can't be solved by any classical circuit using bounded fan-in AND, OR, and NOT gates.While Bernstein–Vazirani's problem was designed to prove an oracle separation between complexity classes BQP and BPP, 2D HLF was designed to prove an explicit separation between complexity classes and ().