13104
ZnO was tested as possible methanol and - since formaldehyde is one of the key intermediates in methanol conversion reactions - also as formaldehyde steam reforming catalyst .
 Chemical: ZnO; Chemical: methanol; Chemical: formaldehyde; Chemical: methanol; Chemical: formaldehyde
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: ZnO, methanol, formaldehyde, methanol, formaldehyde 
Answer:
 Chemical: ZnO; Chemical: methanol; Chemical: formaldehyde; Chemical: methanol; Chemical: formaldehyde