203245
Whitman began his career at MTV Networks , working primarily at Nickelodeon and MTV for eight years , with much of his work focused on live television award shows and concert shows .
 person: Whitman; organization: MTV Networks; organization: Nickelodeon; organization: MTV
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: Whitman, MTV Networks, Nickelodeon, MTV 
Answer:
 person: Whitman; organization: MTV Networks; organization: Nickelodeon; organization: MTV