5580
It is named for  Harold Brown  a physicist who served as United States Secretary of the Air Force from 1965-1969 and later as United States Secretary of  Defense  ( 1977-1981 ) .
 employee of: Harold Brown, Defense
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: Harold Brown, Defense