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Out of the Blue Enterprises is an American children 's television company based in New York City , founded by the co-creator of the Nickelodeon pre-school animated/live action series Blue 's Clues ( hence the company 's name ) Angela C. Santomero and fellow ex-Nick executive Samantha Freeman Alpert .
 American, Nickelodeon
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 American, Nickelodeon