8490
We find that : ( i ) Ti and Cu in ( TiO ( 2 ) ) ( x ) ( Cu ( 2 ) O ) ( y ) alloys have similar local environments as in bulk TiO ( 2 ) and Cu ( 2 ) O except for ( TiO ( 2 ) ) ( Cu ( 2 ) O ) which has some trigonal - planar Cu ions .
 Chemical: Ti; Chemical: Cu; Chemical: ( TiO ( 2 ) ) ( x ) ( Cu ( 2 ) O ) ( y ); Chemical: TiO ( 2 ); Chemical: Cu ( 2 ) O; Chemical: TiO ( 2 ); Chemical: Cu ( 2 ) O; Chemical: Cu
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: Ti; Chemical: Cu; Chemical: ( TiO ( 2 ) ) ( x ) ( Cu ( 2 ) O ) ( y ); Chemical: TiO ( 2 ); Chemical: Cu ( 2 ) O; Chemical: TiO ( 2 ); Chemical: Cu ( 2 ) O; Chemical: Cu