2626
Pelizaeus - Merzbacher disease : detection of mutations Thr181 - - - - Pro and Leu223 - - - - Pro in the proteolipid protein gene , and prenatal diagnosis .
 Disease: Pelizaeus - Merzbacher disease
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: Pelizaeus - Merzbacher disease 
Answer:
 Disease: Pelizaeus - Merzbacher disease