3356
We describe here a Pelizaeus - Merzbacher pedigree of the classical type , with X - linked inheritance , a typical clinical progression , and a pathologic loss of myelinating cells and myelin in the central nervous system .
 Disease: Pelizaeus - Merzbacher
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 
Answer:
 Disease: Pelizaeus - Merzbacher