35903
The IPCC Fourth Assessment Report ( 2007 ) , concluded that attribution was possible for a number of observed changes in the climate ( see effects of global warming ) .
 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