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The continued play of such songs on such stations has also exposed the music to younger generations that can take a renewed interest in the music , prolonging its shelf life beyond what conventional wisdom in the industry may suggest .
 time: shelf life
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: shelf life 
Answer:
 time: shelf life