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
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ZnO; Chemical: methanol; Chemical: formaldehyde; Chemical: methanol; Chemical: formaldehyde