15784
She was one of 16 signatories of an open letter to Ed Miliband in January 2015 calling on the party to commit to oppose further austerity , take rail franchises back into public ownership and strengthen collective bargaining arrangements .
 person: Ed Miliband
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: Ed Miliband 
Answer:
 person: Ed Miliband