[Q]: Sentence: Charcoal, a pure form of carbon made by pyrolysis of wood, has a long history as a metal-smelting fuel, as a filter material and adsorbent and as an artist's material and is one of the three ingredients of gunpowder. Question: Besides fire, what else is charcoal used for? OPTIONS:
- yes
- no
++++++++++
[A]: yes

Q: Does "During the 11th and 12th centuries the Catalan rulers expanded up to north of the Ebro river, and in the 13th century they conquered the Land of Valencia and the Balearic Islands." provide a valid answer to "When did Catalan rulers broaden their territory to north of the Ebro River?"?
OPTIONS:
- yes
- no
A: yes

Problem: Does "Prussia emerged from the war as a great power whose importance could no longer be challenged." answer the question "What gain did Russia make from the results of the war?" OPTIONS:
- yes
- no

A: no

Does the sentence "On September 11, 2001, 53 Army civilians (47 employees and six contractors) and 22 soldiers were among the 125 victims killed in the Pentagon in a terrorist attack when American Airlines Flight 77 commandeered by five Al-Qaeda hijackers slammed into the western side of the building, as part of the September 11 attacks." provide a valid answer to the question "What aircraft was hijacked?" OPTIONS:
- yes
- no

A: yes

Question:
Choose your answer: Is "Houston's aviation history is showcased in the 1940 Air Terminal Museum located in the old terminal building on the west side of the airport." a good answer to the question "What is the second airport that serves Houston?" OPTIONS:
- yes
- no
Answer:
no

[Q]: Sentence: Interest in Darwin's writings continues, and scholars have generated an extensive literature, the Darwin Industry, about his life and work. Question: What kinds of things have been done by scholars interested in Darwin's work? OPTIONS:
- yes
- no
++++++++++
[A]:
yes