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the half-lives would be higher at more typical doses ( 100 " mg is sometimes considered a typical dose The original MDMA synthesis described in Merck 's patent involves brominating safrole to 1 - ( 3,4 - methylenedioxyphenyl ) - 2-bromopropane and then reacting this adduct with methylamine .
 person: Merck
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Merck 
Answer:
 person: Merck