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The abundance of antimony in the Earth 's crust is estimated to be 0.2 to 0.5 parts per million , comparable to thallium at 0.5 parts per million and silver at 0.07 ppm .
 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