Q: Does "In some respects zinc is chemically similar to magnesium: its ion is of similar size and its only common oxidation state is +2." provide a valid answer to "What is zinc chemically close to?"?
A: yes

Q: Does "The most familiar types are translations presented as subtitles or surtitles projected during opera performances, those inserted into concert programs, and those that accompany commercial audio CDs of vocal music." provide a valid answer to "What type of familiar translation may be seen during an opera?"?
A: yes

Q: Does "There is a wide-ranging diaspora of around 5 million people of full or partial Armenian ancestry living outside of modern Armenia." provide a valid answer to "How many Armenians live outside Armenia and the republic within it?"?
A: yes

Q: Does "Since 2001, the Center for Drug Evaluation and Research has averaged 22.9 approvals a year." provide a valid answer to "Who is responsible for approval or rejection of new drugs?"?
A:
yes