Problem: Does "By 1977, some radio stations, like New York's WTFM and NBC-owned WYNY, had switched to an all-soft rock format." answer the question "What radio stationed owned by NBC played only soft rock?"

A: yes

Problem: Does "The whooping crane population by 1941 was estimated at about only 16 birds still in the wild." answer the question "What was the historical range of the whooping crane?"

A: no

Problem: Does "The city also boasts an efficient network of public transportation, which mainly consists of bus, taxi and metro systems." answer the question "How many companies are involved with the network of buses?"

A:
no