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Ritchie Valens Memorial Album is the first greatest hits compilation by Ritchie Valens , featuring his first three charted hits plus tracks from the previous three albums .
 person: Ritchie Valens; person: Ritchie Valens
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: Ritchie Valens, Ritchie Valens 
Answer:
 person: Ritchie Valens; person: Ritchie Valens