51367
Subsequently , he and Peter McMullen developed the basics of the theory in a series of research articles that were later collected into a book .
 person: Peter McMullen
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: Peter McMullen 
Answer:
 person: Peter McMullen