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Longwood Gardens in the  USA  contributed a collection of Conservatory Group and Aquatic Group cultivars originated by Dr  Robert Armstrong  the chief geneticist at Longwood Gardens Pennsylvania USA .
 USA, Robert Armstrong
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 USA, Robert Armstrong