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Here we present a case of withdrawal - emergent RS , which is the first of its kind to be reported .
 Disease: withdrawal - emergent RS
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: withdrawal - emergent RS 
Answer:
 Disease: withdrawal - emergent RS