264681
Machar was one of the original trustees of the University , and became its principal in 1846 , when Thomas Liddell resigned unexpectedly .
 person: Machar; person: Thomas Liddell
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: Machar, Thomas Liddell 
Answer:
 person: Machar; person: Thomas Liddell