QUES: Q: What previous mayor of New York is a billionaire?
A: In 2013, New York City had the highest number of billionaires of any city in the world, higher than the next five U.S. cities combined, including former Mayor Michael R. Bloomberg.
Does the answer answer the question?

ANS: yes

QUES: Q: When did Catalan literature begin a downward trend?
A: Starting in the 16th century, Catalan literature experienced a decline, the language came under the influence of Spanish, and the urban and literary classes became bilingual.
Does the answer answer the question?

ANS: yes

QUES: Q: What agency distributed aid to Yugoslavia?
A: After Stalin's death in 1953, relations with the USSR were relaxed and he began to receive aid as well from the COMECON.
Does the answer answer the question?

ANS: no

QUES: Q: At what venue did the first televised Arena Football League game occur?
A: The Dynamite and Bruisers played in the first-ever televised AFL game the next night, on June 20, 1987, at the Rosemont Horizon in suburban Chicago on ESPN with Bob Rathbun and Lee Corso calling the play.
Does the answer answer the question?

ANS:
yes