58833
Alkyne trimerization describes the [ 2 + 2 + 2 ] cyclization of three alkynes , in the Dötz reaction an alkyne , carbon monoxide and a chromium carbene complex are the reactants .
 person: Dötz
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: Dötz 
Answer:
 person: Dötz