20606
It is located near the pointer stars of the Big Dipper in the constellation Ursa Major and is about 15 square degrees in size .
 astronomical object: Big Dipper; astronomical object: constellation; astronomical object: Ursa Major
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: Big Dipper, constellation, Ursa Major 
Answer:
 astronomical object: Big Dipper; astronomical object: constellation; astronomical object: Ursa Major