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His place of death happens to have been named after Helena , mother of Constantine and his own grandmother , thus realizing the prophecy .
 person: Helena; person: Constantine
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Helena, Constantine 
Answer:
 person: Helena; person: Constantine