547
Anencephaly has been suggested to develop from exencephaly ; however , there is little direct experimental evidence to support this , and the mechanism of transformation remains unclear .
 Disease: Anencephaly; Disease: exencephaly
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: Anencephaly, exencephaly 
Answer:
 Disease: Anencephaly; Disease: exencephaly