58002
New developments since the 2000 s include the recognition of short gamma-ray bursts as a separate class ( likely from merging neutron stars and not associated with supernovae ) , the discovery of extended , erratic flaring activity at X-ray wavelengths lasting for many minutes after most GRBs , and the discovery of the most luminous ( GRB 080319B ) and the former most distant ( GRB 090423 ) objects in the universe .
 astronomical object: GRB 080319B
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: GRB 080319B 
Answer:
 astronomical object: GRB 080319B