648
NOTE : William Collins Whitney was also father-in-law of British politician Almeric Paget and Whitney's son Payne Whitney was son-in-law of U.S. Secretary of  State   John Hay  .
 employee of: State, John Hay
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:
 employee of: State, John Hay