18334
 With its long-neglected , battered roads , Nigeria 's economy is highly dependent on air travel to move people between Abuja , the political capital , Lagos , the commercial capital , and Port Harcourt , the center of the oil industry that makes Nigeria the second-largest economy in sub-Saharan Africa . 
 country capital: Nigeria, Abuja
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
Answer:
 country capital: Nigeria, Abuja