81692
Alan Sharp wrote three more drafts , then David Williamson was brought on to do several more drafts .
 person: Alan Sharp; person: David Williamson
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: Alan Sharp, David Williamson 
Answer:
 person: Alan Sharp; person: David Williamson