22239
The oxidation of terminal olefins generally provide the Markovnikov ketone product , however in cases where substrate favors the aldehyde ( discussed below ) , different ligands can be used to enforce the Markovnikov regioselectivity .
 person: Markovnikov; person: Markovnikov
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: Markovnikov, Markovnikov 
Answer:
 person: Markovnikov; person: Markovnikov