171614
After 1975 , the facility was initially unused , then later operated as a small regional airport for Can Tho .
 location: Can Tho
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: Can Tho 
Answer:
 location: Can Tho