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The use of a sequence of experiments , where the design of each may depend on the results of previous experiments , including the possible decision to stop experimenting , is within the scope of sequential analysis , a field that was pioneered by Abraham Wald in the context of sequential tests of statistical hypotheses .
 person: Abraham Wald
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: Abraham Wald 
Answer:
 person: Abraham Wald