87444
In 2002 , the asteroid was detected by radar from the Arecibo Observatory at a distance of 1.31 " AU .
 location: Arecibo Observatory
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: Arecibo Observatory 
Answer:
 location: Arecibo Observatory