character: Francis Crick
topic: Discovery of DNA structure
grade: 9
subject: Science
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character: James Watson
topic: Collaboration with Crick on DNA structure
grade: 9
subject: Science
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character: Rosalind Franklin
topic: Contributions to DNA structure discovery
grade: 9
subject: Science
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character: Maurice Wilkins
topic: Role in DNA research and collaboration with Franklin
grade: 9
subject: Science
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