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So someone put on Facebook a Great Idea . Why do n't all the Ice Cream Vans stock up with the essentials . Go round the streets playing the tune selling to the Elderly and Essential Workers . Needs to be regulated but it 's the basis of a Great Idea . {@Boris Johnson@} {{USERNAME}}
 Facebook, Boris Johnson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: group, creative work, person, event, product, location, corporation 
Text: {0} 
Answer:
 Facebook, Boris Johnson