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Less well known was his support and collaboration with several teenagers during this era , who would achieve prominence later in life including writer David Dalton , photographer Stephen Shore and artist Bibbe Hansen ( mother of pop musician Beck ) .
 person: David Dalton; person: Stephen Shore; person: Bibbe Hansen; person: Beck
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: David Dalton, Stephen Shore, Bibbe Hansen, Beck 
Answer:
 person: David Dalton; person: Stephen Shore; person: Bibbe Hansen; person: Beck