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On November 28 , 2012 Alexander ( Alex ) B o hm , a bacterial geneticist , died at age 41 , only a few months after taking up a position as an assistant professor at the LOEWE Center for Synthetic Microbiology in Marburg , Germany .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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