15874
 Located just north of Pittsburgh , it lies at the heart of the hard-luck country of western Pennsylvania , a region that has twice prospered the site of America 's first major oil rush in the 1860 's , followed by the boom in the steel industry and twice foundered . 
 location contains: Pennsylvania, Pittsburgh
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:
 location contains: Pennsylvania, Pittsburgh