[Q]: Sentence: Many solar photovoltaic power stations have been built, mainly in Europe. Question: Where have the majority of photovoltaic power stations been built? OPTIONS:
- yes
- no
++++++++++
[A]: yes

Q: Does "As the composer's illness progressed, Sand had become less of a lover and more of a nurse to Chopin, whom she called her "third child"." provide a valid answer to "What did Sand begin referring to Chopin as as his illness got worse?"?
OPTIONS:
- yes
- no
A: yes

Problem: Does "Ecological problems, including deforestation, soil erosion, vermin and drought, led Governor Isaac Pyke to suggest in 1715 that the population be moved to Mauritius, but this was not acted upon and the company continued to subsidise the community because of the island's strategic location." answer the question "How many slaves were on the island in 1723?" OPTIONS:
- yes
- no

A: no

Does the sentence "Whitehead and Russell had thought originally that Principia Mathematica would take a year to complete; it ended up taking them ten years." provide a valid answer to the question "Who paid to publish Principia Mathematica?" OPTIONS:
- yes
- no

A: no

Question:
Choose your answer: Is "The epicenter was in Wenchuan County, Ngawa Tibetan and Qiang Autonomous Prefecture, 80 km west/northwest of the provincial capital of Chengdu, with its main tremor occurring at 14:28:01.42 China Standard Time (06:28:01.42 UTC), on May 12, 2008 lasting for around 2 minutes, in the quake almost 80% of buildings were destroyed." a good answer to the question "How long did the main tremor last?" OPTIONS:
- yes
- no
Answer:
yes

[Q]: Sentence: The early development of solar technologies starting in the 1860s was driven by an expectation that coal would soon become scarce. Question: What slowed the development of solar technologies in the early 20th century? OPTIONS:
- yes
- no
++++++++++
[A]:
no