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The team joined the Western Conference of the Rugby League Conference for the 1999 season .
 organization: Conference; organization: Rugby League Conference
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: Conference, Rugby League Conference 
Answer:
 organization: Conference; organization: Rugby League Conference