19502
Solvent - dependent Raman experiments indicate that the C2 - D band of the neutral imidazole ring is sensitive to H - bonding interaction with donors and acceptors of varying strengths , suggesting that the C2 - D frequency can be used to identify H - bonding partners of specific His residues .
 Chemical: C2 - D; Chemical: imidazole; Chemical: H; Chemical: C2 - D; Chemical: H; Chemical: His
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: C2 - D, imidazole, H, C2 - D, H, His 
Answer:
 Chemical: C2 - D; Chemical: imidazole; Chemical: H; Chemical: C2 - D; Chemical: H; Chemical: His