1959
The index is also intended to enable advertisers to monitor how pervasive the mentions of Web sites operated by rivals may be in cyberspace .
 person: advertisers; person: rivals
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
 Entities: advertisers, rivals 
Answer:
 person: advertisers; person: rivals