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On 3 September , Armstrong Whitworth Whitley s of No. 77 Squadron RAF dropped depth charges at U-705 , causing her to sink with all hands lost in the Bay of Biscay .
 organization: No. 77 Squadron RAF
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: No. 77 Squadron RAF 
Answer:
 organization: No. 77 Squadron RAF