11910
In the late 18th century  Boston  became known as the Cradle of  Liberty  for the agitation there that led to the American Revolution and the independence of the United States from Great Britain .
 city of headquarters: Boston, Liberty
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: Boston, Liberty