[Q]: Sentence: OCA is the preferred method of countering air and missile threats, since it attempts to defeat the enemy closer to its source and typically enjoys the initiative. Question: What does the abbreviation OCA stand for?
++++++++++
[A]: no

[Q]: Sentence: Common ingredients include yams, sweet potato, cassava, onion, tomato and plantain. Question: What are common ingredients in Guinea-Bissau?
++++++++++
[A]: yes

[Q]: Sentence: The United States Army maintains the Ronald Reagan Ballistic Missile Defense Test Site on Kwajalein Atoll. Question: What is the official name of the missile test facility?
++++++++++
[A]:
yes