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The most frequent musical contributor during the first 15 years was Dudley Simpson , who is also well known for his theme and incidental music for " Blake 's 7 " , and for his haunting theme music and score for the original 1970 s version of " The Tomorrow People " .
 person: Dudley Simpson; media: Blake 's 7; media: The Tomorrow People
Please list all entity words in the text that fit the category.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} 
Answer:
 person: Dudley Simpson; media: Blake 's 7; media: The Tomorrow People