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The central gimmick of the show , praised by Microsoft mogul Bill Gates as " the first interactive TV show " , was the use of a " magic drawing screen " - a piece of vinyl plastic that stuck to the television screen via static electricity .
 organization: Microsoft; person: Bill Gates
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:
 organization: Microsoft; person: Bill Gates