47249
The blast of conservative criticism aimed at Gov. Mitt Romney of Massachusetts for backing gay rights in 1994 has shaken his position as the social conservatives ' favored challenger to Senator John McCain of Arizona for the Republican presidential nomination .
 Mitt Romney, Massachusetts; John McCain, Arizona
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 Mitt Romney, Massachusetts; John McCain, Arizona