1500
( For details , see Iowa 1st congressional district election , 2006 .
 organization: Iowa 1st congressional district election , 2006
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: Iowa 1st congressional district election , 2006 
Answer:
 organization: Iowa 1st congressional district election , 2006