Does the sentence "As Spain and Portugal sourced most of their slaves from South-West Africa (the Portuguese through ports in modern-day Angola; the Spanish purchased most of their African slaves from Portuguese traders, and from Arabs whose slave trading was centred in Zanzibar)." provide a valid answer to the question "Where did the Spanish and Portugese enslave most of their black people from?" OPTIONS:
- yes
- no

A: yes

Does the sentence "A widely publicised example of institutionalised sexual slavery are "comfort women", a euphemism for the 200,000 women, mostly from Korea and China, who served in the Japanese army's camps during World War II." provide a valid answer to the question "How many women are believed to have been sexual slaves for the Japenese Army?" OPTIONS:
- yes
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A: yes

Does the sentence "They conclude that Edison's version was able to outstrip the others because of a combination of three factors: an effective incandescent material, a higher vacuum than others were able to achieve (by use of the Sprengel pump) and a high resistance that made power distribution from a centralized source economically viable." provide a valid answer to the question "What made power distribution economically viable in Edison's lamp?" OPTIONS:
- yes
- no

A: yes

Does the sentence "Downtown New Haven, occupied by nearly 7,000 residents, has a more residential character than most downtowns." provide a valid answer to the question "What downtown New Haven restaurant was cited by the New York Times, Esquire and Wine Spectator for its outstanding Spanish cuisine?" OPTIONS:
- yes
- no

A:
no