In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

[Q]: What is the last place listed that engaged in the slave trade?, Context: The slave trade was engaged in by European state and non-state actors such as Great Britain, the Netherlands, Portugal and private companies, as well as various African states and non-state actors. With rising anti-slavery sentiment at home and changing economic realities, Great Britain outlawed the international slave trade in 1807. Following the Napoleonic Wars, Great Britain established the West Africa Squadron in an attempt to halt the international traffic in slaves. It stopped ships of other nations that were leaving the African coast with slaves; the seized slaves were taken to Freetown, a colony in West Africa originally established for the resettlement of freed slaves from Britain. Britain intervened in the Lagos Kingship power struggle by bombarding Lagos in 1851, deposing the slave trade friendly Oba Kosoko, helping to install the amenable Oba Akitoye, and signing the Treaty between Great Britain and Lagos on 1 January 1852. Britain annexed Lagos as a Crown Colony in August 1861 with the Lagos Treaty of Cession. British missionaries expanded their operations and travelled further inland. In 1864, Samuel Ajayi Crowther became the first African bishop of the Anglican Church.
[A]: various African states


[Q]: Who lost out on a deal with West?, Context: According to Capitol Record's A&R, Joe Weinberger, he was approached by West and almost signed a deal with him, but another person in the company convinced Capitol's president not to. Desperate to keep West from defecting to another label, then-label head Damon Dash reluctantly signed West to Roc-A-Fella Records. Jay-Z later admitted that Roc-A-Fella was initially reluctant to support West as a rapper, claiming that many saw him as a producer first and foremost, and that his background contrasted with that of his labelmates.
[A]: Capitol Record


[Q]: Which is not a body that approves standards for video compression: ITU-T, Natarajan, or ISO?, Context: Today, nearly all commonly used video compression methods (e.g., those in standards approved by the ITU-T or ISO) apply a discrete cosine transform (DCT) for spatial redundancy reduction. The DCT that is widely used in this regard was introduced by N. Ahmed, T. Natarajan and K. R. Rao in 1974. Other methods, such as fractal compression, matching pursuit and the use of a discrete wavelet transform (DWT) have been the subject of some research, but are typically not used in practical products (except for the use of wavelet coding as still-image coders without motion compensation). Interest in fractal compression seems to be waning, due to recent theoretical analysis showing a comparative lack of effectiveness of such methods.
[A]:
Natarajan