173889
This concept involves all human structures using sunlight to split water as a source of hydrogen ( which when burnt as a fuel produces water ) and to absorb carbon dioxide and use it to make food or fertilizer .
 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