1499
Rather than trying to make decisions themselves on what content is appropriate , Valve enhanced its filtering system to allow developers and publishers to indicate and justify the types of mature content ( including violence , nudity , and sexual content ) in their games .
 organization: Valve
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:
 organization: Valve