3552
Numerous non-fiction books about the series , including guidebooks and critical studies , have also been published , and a dedicated " Doctor Who Magazine " with newsstand circulation has been published regularly since 1979 .
 media: Doctor Who Magazine
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:
 media: Doctor Who Magazine