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For the 2015 and 2019 NFL preseasons , for 8 and 2 games respectively , the NFL experimented with the " umpire ( U ) , " The side judge was added for 1978 , when the NFL implemented new rules to open up the passing game .
 organization: NFL; organization: NFL; organization: NFL
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: NFL, NFL, NFL 
Answer:
 organization: NFL; organization: NFL; organization: NFL