character: Francis Crick
topic: Co-discovery of DNA structure
grade: 6
subject: History
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character: James Watson
topic: Co-discovery of DNA structure
grade: 6
subject: History
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character: Maurice Wilkins
topic: Co-discovery of DNA structure
grade: 6
subject: History
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character: Rosalind Franklin
topic: Contributions to DNA structure research
grade: 6
subject: History
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