Question: What abolished slavery throughout the nation the country that does not use filtering software gain independence from?

full_context: Document 1: Independence Day (United States): During the American Revolution, the legal separation of the Thirteen Colonies from Great Britain in 1776 actually occurred on July 2, when the Second Continental Congress voted to approve a resolution of independence that had been proposed in June by Richard Henry Lee of Virginia declaring the United States independent from Great Britain rule. After voting for independence, Congress turned its attention to the Declaration of Independence, a statement explaining this decision, which had been prepared by a Committee of Five, with Thomas Jefferson as its principal author. Congress debated and revised the wording of the Declaration, finally approving it two days later on July 4. A day earlier, John Adams had written to his wife Abigail:
Document 2: British Empire: With support from the British abolitionist movement, Parliament enacted the Slave Trade Act in 1807, which abolished the slave trade in the empire. In 1808, Sierra Leone was designated an official British colony for freed slaves. The Slavery Abolition Act passed in 1833 abolished slavery in the British Empire on 1 August 1834 (with the exception of St. Helena, Ceylon and the territories administered by the East India Company, though these exclusions were later repealed). Under the Act, slaves were granted full emancipation after a period of 4 to 6 years of "apprenticeship".
Document 3: Independence Day (United States): Independence Day, also referred to as the Fourth of July or July Fourth, is a federal holiday in the United States commemorating the adoption of the Declaration of Independence on July 4, 1776. The Continental Congress declared that the thirteen American colonies regarded themselves as a new nation, the United States of America, and were no longer part of the British Empire. The Congress actually voted to declare independence two days earlier, on July 2.
Document 4: British Empire: Two years later, the Royal African Company was inaugurated, receiving from King Charles a monopoly of the trade to supply slaves to the British colonies of the Caribbean. From the outset, slavery was the basis of the British Empire in the West Indies. Until the abolition of the slave trade in 1807, Britain was responsible for the transportation of 3.5 million African slaves to the Americas, a third of all slaves transported across the Atlantic. To facilitate this trade, forts were established on the coast of West Africa, such as James Island, Accra and Bunce Island. In the British Caribbean, the percentage of the population of African descent rose from 25 percent in 1650 to around 80 percent in 1780, and in the 13 Colonies from 10 percent to 40 percent over the same period (the majority in the southern colonies). For the slave traders, the trade was extremely profitable, and became a major economic mainstay for such western British cities as Bristol and Liverpool, which formed the third corner of the so-called triangular trade with Africa and the Americas. For the transported, harsh and unhygienic conditions on the slaving ships and poor diets meant that the average mortality rate during the Middle Passage was one in seven.
Document 5: Slavery in international law: The concept has its roots in the 1807 Abolition of Slavery Act of Great Britain. Many academics in the field perceive this as the beginning of the end of the traditional form of slavery: chattel slavery. In the 19th century, Britain controlled the majority of the world through its colonies. Consequently, in passing this law to abolish slavery, the British Parliament abolished slavery in the vast majority of its colonies.
Document 6: Facebook: In many countries the social networking sites and mobile apps have been blocked temporarily or permanently, including China, Iran, Syria, and North Korea. In May 2018, the government of Papua New Guinea announced that it would ban Facebook for a month while it considered the impact of the website on the country, though no ban has since occurred.
Document 7: Cloob: Cloob.com is a Persian-language social networking website, mainly popular in Iran. After the locally (and internationally) popular social networking website Orkut was blocked by the Iranian government, a series of local sites and networks, including Cloob, emerged to fill the gap. Its main page contains the title Iranian Virtual Society and states that all content is controlled in accordance with Iranian law, a policy intended to lower the risk of government censorship.
Document 8: Saint Helena: Although the importation of slaves to St Helena had been banned in 1792, the phased emancipation of over 800 resident slaves did not take place until 1827, which was still some six years before the British Parliament passed legislation to ban slavery in the colonies.
Document 9: United States Declaration of Independence: The United States Declaration of Independence is the statement adopted by the Second Continental Congress meeting at the Pennsylvania State House (Independence Hall) in Philadelphia on July 4, 1776, which announced that the thirteen American colonies, then at war with the Kingdom of Great Britain, regarded themselves as thirteen independent sovereign states, no longer under British rule. These states would found a new nation -- the United States of America. John Adams was a leader in pushing for independence, which was passed on July 2 with no opposing vote cast. A committee of five had already drafted the formal declaration, to be ready when Congress voted on independence.
Document 10: Sociology of the Internet: Governments are also getting online. Some countries, such as those of Cuba, Iran, North Korea, Myanmar, the People's Republic of China, and Saudi Arabia use filtering and censoring software to restrict what people in their countries can access on the Internet. In the United Kingdom, they also use software to locate and arrest various individuals they perceive as a threat. Other countries including the United States, have enacted laws making the possession or distribution of certain material such as child pornography illegal but do not use filtering software. In some countries Internet service providers have agreed to restrict access to sites listed by police.
Document 11: Slave Trade Act 1807: The Slave Trade Act 1807, officially An Act for the Abolition of the Slave Trade, was an Act of the Parliament of the United Kingdom prohibiting the slave trade in the British Empire. Although it did not abolish the practice of slavery, it did encourage British action to press other nations states to abolish their own slave trades.
Document 12: Book censorship in China: Book censorship in the People's Republic of China (PRC) is implemented or mandated by the PRC's ruling party, the Communist Party of China. Book censorship is widespread in China. Enforcement is strict and sometimes inconsistent. Punishment for violations can result in prison. The Chinese government is extremely sensitive to any opinions on the politics and history of China and its leaders that differ from currently sanctioned opinions, or that discuss topics which are officially taboo. What is officially taboo can change over time.
Document 13: United States Declaration of Independence: The Declaration of Independence is the statement adopted by the Second Continental Congress meeting at the Pennsylvania State House (Independence Hall) in Philadelphia on July 4, 1776, which announced that the thirteen American colonies, then at war with the Kingdom of Great Britain, regarded themselves as thirteen independent sovereign states, no longer under British rule. These states would found a new nation -- the United States of America. John Adams was a leader in pushing for independence, which was passed on July 2 with no opposing vote cast. A committee of five had already drafted the formal declaration, to be ready when Congress voted on independence.
Document 14: Iran: Iran received access to the Internet in 1993. According to 2014 census, around 40% of the population of Iran are Internet users. Iran ranks 24th among countries by number of Internet users. According to the statistics provided by the web information company of Alexa, Google Search and Yahoo! are the most used search engines in Iran. Over 80% of the users of Telegram, a cloud-based instant messaging service, are from Iran. Instagram is the most popular online social networking service in Iran. Direct access to Facebook has been blocked in Iran since the 2009 Iranian presidential election protests, due to organization of the opposition movements on the website; but however, Facebook has around 12 to 17 million users in Iran who are using virtual private networks and proxy servers to access the website. Around 90% of Iran's e-commerce takes place on the Iranian online store of Digikala, which has around 750,000 visitors per day and more than 2.3 million subscribers. Digikala is the most visited online store in the Middle East, and ranks 4th among the most visited websites in Iran.
Document 15: United States Declaration of Independence: The United States Declaration of Independence is the statement adopted by the Second Continental Congress meeting at the Pennsylvania State House (now known as Independence Hall) in Philadelphia on July 4, 1776. The Declaration announced that the thirteen American colonies at war with the Kingdom of Great Britain would now regard themselves as thirteen independent sovereign states no longer under British rule. With the Declaration, these states formed a new nation -- the United States of America.
ground_truth: The Slavery Abolition Act
sub_queries: What is one country that does not use filtering software? Answer: United States
where did United States gain independence from Answer: the British Empire
What abolished slavery throughout the British Empire ? Answer: The Slavery Abolition Act