18138
Screening of transition and post - transition metals to incorporate into copper oxide and copper bismuth oxide for photoelectrochemical hydrogen evolution .
 Chemical: copper oxide; Chemical: copper bismuth oxide; Chemical: hydrogen
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: copper oxide; Chemical: copper bismuth oxide; Chemical: hydrogen