12938
Vice-President Calvin Coolidge served as honorary chairman of the Advisory Council of Better Homes in America and Secretary of  Commerce   Herbert Hoover  was president of its board of directors .
 employee of: Commerce, Herbert Hoover
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: Commerce, Herbert Hoover