18139
A new dispenser and scanner system is used to create and screen Bi - M - Cu oxide arrays for cathodic photoactivity , where M represents 1 of 22 different transition and post - transition metals .
 Chemical: Bi; Chemical: Cu; Chemical: oxide
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: Bi; Chemical: Cu; Chemical: oxide