[Q]: Sentence: Gatherings are opened and closed with kingdom songs (hymns) and brief prayers. Question: What are Jehovah Witnesses' gatherings opened and closed with?
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[A]: yes

[Q]: Sentence: Genetic changes in bacterial genomes come from either random mutation during replication or "stress-directed mutation", where genes involved in a particular growth-limiting process have an increased mutation rate. Question: What can cause mutation in bacteria?
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[A]: no

[Q]: Sentence: It is owned by the Landmark Trust and is open to the public. Question: In what cardinal direction is Crownhill Fort located outside the city?
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[A]:
no