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The Spanish defenders , having had time to prepare an ambush for the aimlessly thrashing , mosquito-swatting newcomers , sprang on them with mounted lancers , sending them careening back toward the beach in utter confusion .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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