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His assistant at the time was Jurg Lanzrein who also was a co-author for Ballet Scores in the  Benesh Movement Notation  ( 1973 - NEW YORK PUBLIC LIBRARY ) After years of illness  Balanchine  died on April 30 1983 in New York City of Creutzfeldt Jakob disease diagnosed only after his death .
 employee of: Benesh Movement Notation, Balanchine
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:  Benesh Movement Notation, Balanchine 
Answer:
 employee of: Benesh Movement Notation, Balanchine