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His early influences included Little Richard , Janis Joplin , and Robert Plant .
 person: Little Richard; person: Janis Joplin; person: Robert Plant
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Little Richard, Janis Joplin, Robert Plant 
Answer:
 person: Little Richard; person: Janis Joplin; person: Robert Plant