38943
The forcible discharge of single spores termed ballistospores involves formation of a small drop of water ( Buller 's drop ) , which upon contact with the spore leads to its projectile release with an initial acceleration of more than 10,000 g .
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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:  
Answer:
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