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Davis ' laboratory has developed innovative brain-imaging approaches , culminating in the first functional MRI images of brain networks underlying the human pain experience and the first images of the impact of deep brain stimulation for Parkinsonian tremor .
 person: Davis
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: Davis 
Answer:
 person: Davis