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The taxonomy of the Gastropoda , as revised by Winston Ponder and David R. Lindberg in 1997 , is an older taxonomy of the class Gastropoda , the class of molluscs consisting of all snails and slugs .
 person: Winston Ponder; person: David R. Lindberg
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: Winston Ponder, David R. Lindberg 
Answer:
 person: Winston Ponder; person: David R. Lindberg