Q: Does "It was the first time that a national mourning period had been declared for something other than the death of a state leader, and many have called it the biggest display of mourning since the death of Mao Zedong." provide a valid answer to "What came to a halt during the moment of silence?"?
A: no

Q: Does "The Houston area is the top U.S. market for exports, surpassing New York City in 2013, according to data released by the U.S. Department of Commerce's International Trade Administration." provide a valid answer to "In what did Houston pass New York City in 2013?"?
A: yes

Q: Does "In 1900, the state legislature passed a new constitution, with voter registration rules that disfranchised most blacks and many poor whites." provide a valid answer to "What happened in 1900?"?
A: yes

Q: Does "During the 1980s, some hard rock bands moved away from their hard rock roots and more towards pop rock, while others began to return to a hard rock sound." provide a valid answer to "What were some hard rock bands of the 1970s?"?
A:
no