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Italian Naval researchers carefully researched Grossi 's claims and came to conclusions how the failed attacks might have occurred and left Grossi in the belief that he successfully attacked and sank the major battleships .
 Grossi, Grossi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Grossi, Grossi