5543
Aldehyde dehydrogenases : from eye crystallins to metabolic disease and cancer stem cells .
 Chemical: Aldehyde
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Aldehyde 
Answer:
 Chemical: Aldehyde