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U.S. Senators Chuck Grassley and  Tom Harkin   Iowa  Governor Tom Vilsack Sioux City Mayor Dave Ferris the Siouxland Chamber of Commerce and House Speaker of Sioux City Christopher Rants a longtime ACME Comics customer all wrote letters of support .
 state or provinces of residence: Tom Harkin, Iowa
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:
 state or provinces of residence: Tom Harkin, Iowa