81299
AT&T 's competitor Comcast had previously acquired NBCUniversal in a similar bid to increase its media holdings , in concert with its ownership of television and internet providers .
 AT&T, Comcast, NBCUniversal
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 AT&T, Comcast, NBCUniversal