Problem: Please answer a question about the following article about Pacific War:
Starting in mid-June 1944, Iwo Jima came under sustained aerial bombardment and naval artillery fire. However, Kuribayashi's hidden guns and defenses survived the constant bombardment virtually unscathed. On 19 February 1945, some 30,000 men of the 3rd, 4th, and 5th Marine Divisions landed on the southeast coast of Iwo, just under Mount Suribachi; where most of the island's defenses were concentrated. For some time, they did not come under fire. This was part of Kuribayashi's plan to hold fire until the landing beaches were full. As soon as the Marines pushed inland to a line of enemy bunkers, they came under devastating machine gun and artillery fire which cut down many of the men. By the end of the day, the Marines reached the west coast of the island, but their losses were appalling; almost 2,000 men killed or wounded.
How many U.S. Marines were killed by the time thhey reached the west coast of the island?
A: almost 2,000
Problem: Please answer a question about the following article about Federalism:
Alternatively, or in addition to this practice, the members of an upper house may be indirectly elected by the government or legislature of the component states, as occurred in the United States prior to 1913, or be actual members or delegates of the state governments, as, for example, is the case in the German Bundesrat and in the Council of the European Union. The lower house of a federal legislature is usually directly elected, with apportionment in proportion to population, although states may sometimes still be guaranteed a certain minimum number of seats.
Can the members of the upper house be elected directly or indirectly? 
A: indirectly
Problem: Please answer a question about the following article about Arnold Schwarzenegger:
In 1969, Schwarzenegger met Barbara Outland (later Barbara Outland Baker), an English teacher he lived with until 1974. Schwarzenegger talked about Barbara in his memoir in 1977: "Basically it came down to this: she was a well-balanced woman who wanted an ordinary, solid life, and I was not a well-balanced man, and hated the very idea of ordinary life." Baker has described Schwarzenegger as "[a] joyful personality, totally charismatic, adventurous, and athletic" but claims towards the end of the relationship he became "insufferable – classically conceited – the world revolved around him". Baker published her memoir in 2006, entitled Arnold and Me: In the Shadow of the Austrian Oak. Although Baker, at times, painted an unflattering portrait of her former lover, Schwarzenegger actually contributed to the tell-all book with a foreword, and also met with Baker for three hours. Baker claims, for example, that she only learned of his being unfaithful after they split, and talks of a turbulent and passionate love life. Schwarzenegger has made it clear that their respective recollection of events can differ. The couple first met six to eight months after his arrival in the U.S – their first date was watching the first Apollo Moon landing on television. They shared an apartment in Santa Monica for three and a half years, and having little money, would visit the beach all day, or have barbecues in the back yard. Although Baker claims that when she first met him, he had "little understanding of polite society" and she found him a turn-off, she says, "He's as much a self-made man as it's possible to be – he never got encouragement from his parents, his family, his brother. He just had this huge determination to prove himself, and that was very attractive … I'll go to my grave knowing Arnold loved me."
What did Baker say Schwarzenegger didn't understand when she first met him?
A: polite society
Problem: Please answer a question about the following article about Pitch (music):
The relative pitches of individual notes in a scale may be determined by one of a number of tuning systems. In the west, the twelve-note chromatic scale is the most common method of organization, with equal temperament now the most widely used method of tuning that scale. In it, the pitch ratio between any two successive notes of the scale is exactly the twelfth root of two (or about 1.05946). In well-tempered systems (as used in the time of Johann Sebastian Bach, for example), different methods of musical tuning were used. Almost all of these systems have one interval in common, the octave, where the pitch of one note is double the frequency of another. For example, if the A above middle C is 440 Hz, the A an octave above that is 880 Hz (info).
The pitch ratio between any two successive notes is?
A:
the twelfth root of two