character: James Watson
topic: Co-discoverer of the structure of DNA
grade: 6
subject: History
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character: Francis Crick
topic: Co-discoverer of the structure of DNA
grade: 6
subject: History
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character: Rosalind Franklin
topic: Her contributions to DNA structure discovery
grade: 6
subject: History
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character: Avery MacLeod McCarty
topic: His work on DNA as the material of heredity
grade: 6
subject: History
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