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The rules proposed by California and 16 other states meant to ratchet down greenhouse gas emissions are precluded by federal power  EPA  Administrator  Stephen L. Johnson  said .
 employee of: EPA, Stephen L. Johnson
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: EPA, Stephen L. Johnson