character: Francis Crick
topic: Discovery of DNA Double Helix
grade: 4
subject: History
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character: James Watson
topic: Collaboration with Crick in DNA Structure Model
grade: 4
subject: History
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character: Rosalind Franklin
topic: Contribution to Understanding DNA through X-ray Diffraction
grade: 4
subject: History
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character: Maurice Wilkins
topic: Shared Nobel Prize with Watson and Crick
grade: 4
subject: History
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