[Q]: Sentence: Rich alluvial diamond deposits make Namibia a primary source for gem-quality diamonds. Question: What does rich alluvial diamond deposits make Namibia a source of?
++++++++++
[A]: yes

[Q]: Sentence: Of all major Hispanic groups, Puerto Ricans are the least likely to be proficient in Spanish, but millions of Puerto Rican Americans living in the U.S. mainland nonetheless are fluent in Spanish. Question: Where are the biggest population of Puerto Ricans on the mainland?
++++++++++
[A]: no

[Q]: Sentence: Immediately after the War The Saint-Germain-des-Pres quarter and the nearby Saint-Michel quarter became home to many small jazz clubs, mostly found in cellars because of a lack of space; these included the Caveau des Lorientais, the Club Saint-Germain, the Rose Rouge, the Vieux-Colombier, and the most famous, Le Tabou. Question: When did most of the jazz clubs close down?
++++++++++
[A]:
no