1166
Since mid-June 1991 , when violent eruptions triggered Mount Pinatubo 's first lahars in 500 years , a system to monitor and warn of lahars has been in operation .
 location: Mount Pinatubo
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: Mount Pinatubo 
Answer:
 location: Mount Pinatubo