5110
He started his working career with Mobil Oil Nigeria Limited and was later seconded to the Nigerian National Petroleum Corporation ( NNPC ) as one of the pioneer staff assembled to develop the marketing department of the corporation 's Warri Refinery and Petrochemical Company .
 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