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History Trident was set up in August 1970 to deal with the problem of fairly allocating commercial airtime from a television transmitter at Bilsdale in North Yorkshire which straddled the catchment areas of two Independent Television ( ITV ) companies .
 North Yorkshire, Independent Television
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 North Yorkshire, Independent Television