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Eisenhower National Historic Site was the home and farm of General and President of the  United States   Dwight D. Eisenhower  and Mamie Doud Eisenhower .
 employee of: United States, Dwight D. Eisenhower
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:  United States, Dwight D. Eisenhower 
Answer:
 employee of: United States, Dwight D. Eisenhower