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While the infection involves a number of bacteria , it is believed that most infections start with Gardnerella vaginalis creating a biofilm , which allows other opportunistic bacteria to thrive .
 location: Gardnerella
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: Gardnerella 
Answer:
 location: Gardnerella