12167
A donor - acceptor type organic dye connected with a quinoidal thiophene as a pi - conjugated chain , cyano - [ 5 ' - ( 4 ' ' - ( N , N - dimethylamino ) benzylidene ) - 5H - thiophen - 2 ' - ylidene ] acetic acid , was synthesized and applied to dye - sensitized solar cells ( DSSCs ) .
 Chemical: quinoidal thiophene; Chemical: cyano - [ 5 ' - ( 4 ' ' - ( N , N - dimethylamino ) benzylidene ) - 5H - thiophen - 2 ' - ylidene ] acetic acid
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: quinoidal thiophene; Chemical: cyano - [ 5 ' - ( 4 ' ' - ( N , N - dimethylamino ) benzylidene ) - 5H - thiophen - 2 ' - ylidene ] acetic acid