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Filming for the series began in the summer of 1954 , and " Lassie " made its début Sunday , September 12 , 1954 , at 7:00 " p.m. EST , a time slot the show would call home on CBS for the next seventeen years .
 organization: CBS
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: CBS