55624
By knowing the expected time when an eclipse would be observed at a standard longitude ( such as Greenwich ) , the time difference could be computed by accurately observing the local time of the eclipse .
 location: Greenwich
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: Greenwich 
Answer:
 location: Greenwich