18246
Vibrational assignments have provided the frequency of the Cu - C stretching mode , nu 3 , in the ground and all three excited states , along with both bending modes , nu 4 and nu 5 , in the A ( 1 ) Sigma ( + ) and B ( 1 ) Pi states , and the Cu - C = C bending mode , nu 5 , in the ground state .
 Chemical: Cu - C; Chemical: Cu - C = C
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: Cu - C; Chemical: Cu - C = C