38058
Since the 1970 s , Casablanca had planned to build a metro system to offer some relief to the problems of traffic congestion and poor air quality .
 location: Casablanca
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: Casablanca 
Answer:
 location: Casablanca