7692
This round is played like this : the three envelopes , ruby , emerald , and sapphire , are now attached to a map of the Earth .
 astronomical object: Earth
Please list all entity words in the text that fit the category.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} 
Answer:
 astronomical object: Earth