Problem: Does "Because of their ubiquity, drugs that act on glutamate or GABA tend to have broad and powerful effects." answer the question "Tranquilizers affect which of the two common neurotransmitters?"

A: no

Problem: Does "This has on occasion led to disagreement between national associations and clubs as to the availability of players, who could become injured or fatigued in a friendly." answer the question "What do international leagues' friendlies happen in the middle of?"

A: no

Problem: Does "However, most Slavic languages (including Czech) have been distanced in this way from Russian influences because of widespread public resentment against the former Soviet Union (which occupied Czechoslovakia in 1968)." answer the question "What language family is Czech?"

A:
yes