7617
a number of people killed , perhaps several people being killed in the explosion , which happened just moments ago .
 person: a number of people; person: several people
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
 Entities: a number of people, several people 
Answer:
 person: a number of people; person: several people