373979
Dr. Michelson is the sole inventor of more than 250 United States patented instruments , operative procedures , and medical devices related to advances in spinal surgery or to the more general field of orthopedic surgery .
 person: Michelson
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: Michelson 
Answer:
 person: Michelson