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In the 1960 s , Geoffrey Chew and Steven Frautschi discovered that the mesons make families called Regge trajectories with masses related to spins in a way that was later understood by Yoichiro Nambu , Holger Bech Nielsen and Leonard Susskind to be the relationship expected from rotating strings .
 person: Geoffrey Chew; person: Steven Frautschi; person: Regge; person: Yoichiro Nambu; person: Holger Bech Nielsen; person: Leonard Susskind
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: Geoffrey Chew, Steven Frautschi, Regge, Yoichiro Nambu, Holger Bech Nielsen, Leonard Susskind 
Answer:
 person: Geoffrey Chew; person: Steven Frautschi; person: Regge; person: Yoichiro Nambu; person: Holger Bech Nielsen; person: Leonard Susskind