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Alfred Gray  is work covered a great part of differential geometry. In September 2000, a remarkable International Congress on Differential Geometry was held in his memory in Bilbao , Spain. Mathematicians from all over the world, representing 24 countries, attended the event.
 place of death: Alfred Gray , Bilbao
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: place of death, place of birth, education degree, education institution 
Text: {0} 
Answer:
 place of death: Alfred Gray , Bilbao