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We describe two sibs with typical PWS presenting deletion of SNRPN detected by fluorescence in situ hybridization ( FISH ) .
 Disease: PWS
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
 Entities: PWS 
Answer:
 Disease: PWS