4455
As the waters around Antarctica are very deep ( ) , they act as a carbon dioxide sink : this process exports large quantities of carbon ( fixed carbon dioxide , CO ) from the biosphere and sequesters it for about 1,000 " years .
 location: Antarctica
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: Antarctica