[Q]: Sentence: Vaccines rely on immune modulation or augmentation. Question: What do vaccines need to work? OPTIONS:
- yes
- no
++++++++++
[A]: yes

[Q]: Sentence: South and North America remained separated by equatorial seas (they joined during the Neogene); the components of the former southern supercontinent Gondwana continued to split apart, with Africa, South America, Antarctica and Australia pulling away from each other. Question: In which period did North and South america join? OPTIONS:
- yes
- no
++++++++++
[A]: yes

[Q]: Sentence: Men who had been free people of color before the war comprised 26% of those elected to state and federal office in South Carolina from 1868 to 1876. Question: What percentage of those elected from 1868 to 1876 were Freemen? OPTIONS:
- yes
- no
++++++++++
[A]:
yes