37735
Some comets have been observed to break up during their perihelion passage , including great comets West and Ikeya–Seki .
 location: West; location: Ikeya–Seki
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: West, Ikeya–Seki 
Answer:
 location: West; location: Ikeya–Seki