38523
Also , even though Earth and other terrestrial planets are exceptionally silicon-rich and carbon-poor ( the relative abundance of silicon to carbon in Earth 's crust is roughly 925 : 1 ) , terrestrial life is carbon-based .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None