271788
In the late 1960s , bus ridership decreases combined with rising expenses forced WPS to reduce deficits by cutting back on service .
 organization: WPS
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: WPS 
Answer:
 organization: WPS