10775
He was found on the 39th floor in the restroom of the offices of  Richard Mellon Scaife  inside One Oxford Center  Pittsburgh  .
 cities of residence: Richard Mellon Scaife, 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: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 cities of residence: Richard Mellon Scaife, Pittsburgh