Does the sentence "Through July 1, 2013, the MacBook Air took in 56 percent of all Ultrabook sales in the United States, although being one of the higher-priced competitors, though several Ultrabooks with better features were often more expensive than the MacBook Air." provide a valid answer to the question "When was the competetive pricing of MacBooks especially effective?" OPTIONS:
- yes
- no

A: no

Does the sentence "Prominent reformer of Orthodox Church music from the first half of 14th century was John Kukuzelis; he also introduced a system of notation widely used in the Balkans in the following centuries." provide a valid answer to the question "Who were the leading composers of the trecento period?" OPTIONS:
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- no

A: no

Does the sentence "Some of these experts, including Giambattista Benedetti and Giuseppe Moleto, believed Easter should be computed from the true motions of the sun and moon, rather than using a tabular method, but these recommendations were not adopted." provide a valid answer to the question "What did mathematicians of the time want to use to set the date of Easter?" OPTIONS:
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- no

A: yes

Does the sentence "During the American Civil Rights movement of the 1950s and 1960s, some African-American leaders in the United States, notably Malcolm X, objected to the word Negro because they associated it with the long history of slavery, segregation, and discrimination that treated African Americans as second-class citizens, or worse." provide a valid answer to the question "What movement sprouted this change in rhetoric?" OPTIONS:
- yes
- no

A:
no