57906
At its height it encompassed an area covering not only most of Chad , but also parts of southern Libya ( Fezzan ) and eastern Niger , northeastern Nigeria and northern Cameroon .
 location: Chad; location: Libya; location: Fezzan; location: Niger; location: Nigeria; location: Cameroon
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: Chad, Libya, Fezzan, Niger, Nigeria, Cameroon 
Answer:
 location: Chad; location: Libya; location: Fezzan; location: Niger; location: Nigeria; location: Cameroon