67141
Although the Niger Delta would seem like an obvious candidate , it was a maze of streams and swamps that did not look like the head of a great river .
 location: Niger Delta
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: Niger Delta 
Answer:
 location: Niger Delta