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Start Over Subjects Colorado ✖Remove constraint Subjects: Colorado Titles Colorado governor Lee Knous handing Sabin the pen with which he signed the Sabin health bill ✖Remove constraint Titles: Colorado governor Lee Knous handing Sabin the pen with which he signed the Sabin health bill Dates by Range 1900-1949 ✖Remove constraint Dates by Range: 1900-1949

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