Does the sentence "Marwan ibn Muhammad, the future Marwan II, finally ended the war in 737 with a massive invasion that is reported to have reached as far as the Volga, but the Khazars remained unsubdued." provide a valid answer to the question "What was Marwan II's name before he became caliph?" OPTIONS:
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A: yes

Question:
Choose your answer: Is "On 19 July 1956, the US and UK abruptly withdrew their offer to finance construction of the Aswan Dam, citing concerns that Egypt's economy would be overwhelmed by the project." a good answer to the question "What construction project suffered from foreign political retaliation against Nasser?" OPTIONS:
- yes
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Answer:
yes

QUES: Q: What was viewed by some as enhanced television format and not true HDTV format?
A: (According to some reports, a mooted 750-line (720p) format (720 progressively scanned lines) was viewed by some at the ITU as an enhanced television format rather than a true HDTV format, and so was not included, although 19201080i and 1280720p systems for a range of frame and field rates were defined by several US SMPTE standards.)
Does the answer answer the question? OPTIONS:
- yes
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ANS: yes

Does "In 1951 he implemented a self-management system that differentiated Yugoslavia from other socialist countries." contain the correct answer to "When did Tito implement a self-management system that differentiated Yugoslavia from other socialist coutnries?"
OPTIONS:
- yes
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A: yes

question: OPTIONS:
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He gave two piano concerts and received many favourable reviewsin addition to some commenting (in Chopin's own words) that he was "too delicate for those accustomed to the piano-bashing of local artists".
Why did some critics say that Chopin was too delicate?

answer: yes

question: OPTIONS:
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Portugal's central bank is the Banco de Portugal, an integral part of the European System of Central Banks.
What is the name of Portugal's central bank?

answer:
yes