Does "According to Wilson, an early reference to the word "samurai" appears in the Kokin Wakashu (905914), the first imperial anthology of poems, completed in the first part of the 10th century." contain the correct answer to "When is the first known use of 'samurai'?"
OPTIONS:
- yes
- no

A: yes

Does "These core functions express the ways in which the Air Force is particularly and appropriately suited to contribute to national security, but they do not necessarily express every aspect of what the Air Force contributes to the nation." contain the correct answer to "What do these core functions of the Air Force express?"
OPTIONS:
- yes
- no

A: yes

Does "Unhappy with this change of policy by the Portuguese government, Napoleon sent an army to invade Portugal." contain the correct answer to "When did Napoleon's invasion of Portugal begin?"
OPTIONS:
- yes
- no

A:
no