5241
For the outgassing of CO from calcium carbonate to happen at an economically useful rate , the equilibrium pressure must significantly exceed the ambient pressure of CO. And for it to happen rapidly , the equilibrium pressure must exceed total atmospheric pressure of 101 " kPa , which happens at 898 " °C .
 location: CO
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: CO