7232
In the 35 years since then Sen.  Joseph Biden  D-Del. has remained at the side of his family commuting nearly two hours each morning from his  Wilmington  home to Washington then returning each night after work at first by car and later by train .
 cities of residence: Joseph Biden, Wilmington
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: Joseph Biden, Wilmington