3579
$ 24 M ad campaign for Keystone pipeline had little impact : survey http://t.co/H1TW9j1Enx
 location: Keystone
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: Keystone 
Answer:
 location: Keystone