7221
The Institute's alumni included  Mario Menocal  who became the third president of  Cuba  ; copper magnate William Cornell Greene ; and songwriter Irving Caesar .
 employee of: Mario Menocal, Cuba
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: Mario Menocal, Cuba