68370
Their spectra are peculiar by having weak hydrogen while on the other hand carbon and helium lines are extra strong , a type of Extreme helium star .
 astronomical object: Extreme helium star
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Extreme helium star 
Answer:
 astronomical object: Extreme helium star