4570
Surrounded by divergent religious , economic , and cultural histories , the middle belt has been the melting pot where small and large ethno-religious groups in Nigeria have long coexisted , but where they have also increasingly collided over land , resources , identity and political power .
 location: Nigeria
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Nigeria