54343
During the 10th century AD , the people of Igbo-Ukwu , near the Niger Delta , buried their leaders with elephant tusks .
 location: Igbo-Ukwu; location: Niger Delta
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Igbo-Ukwu, Niger Delta 
Answer:
 location: Igbo-Ukwu; location: Niger Delta