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Digital forms of emoticons on the Internet were included in a proposal by Scott Fahlman of Carnegie Mellon University in Pittsburgh , Pennsylvania , in a message on September 19 , 1982 .
 Scott Fahlman, Carnegie Mellon University, Pittsburgh, Pennsylvania
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Scott Fahlman, Carnegie Mellon University, Pittsburgh, Pennsylvania