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However the seat continued to be considered to be Safe Republican by many sources with CQ Politics noting that  Grassley  is one of  Iowa  's most durable politicians .
 employee of: Grassley, Iowa
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Grassley, Iowa 
Answer:
 employee of: Grassley, Iowa