1070
vice chairman president and chief executive will be the third senior executive to depart the company in nine months when its smaller acquirer  Caritor Inc.  of  San Ramon  Calif. completes the purchase .
 city of headquarters: Caritor Inc., San Ramon
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:
 city of headquarters: Caritor Inc., San Ramon