388962
He finds himself not on Mars but remaining on Earth , except in a phantom state , unable to be perceived by anyone in the original world and able to walk through buildings and swim through solid ground with minimal effort .
 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