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The first claimed detection of mammalian endogenous DMT was published in June 1965 : German researchers F. Franzen and H. Gross report to have evidenced and quantified DMT , along with its structural analog bufotenin ( 5-HO - DMT ) , in human blood and urine .
 person: F. Franzen; person: H. Gross
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: F. Franzen, H. Gross 
Answer:
 person: F. Franzen; person: H. Gross