13880
Density functional theory calculations were employed to rationalize the electronic structure of [ H1 ] ( 0 ) and to facilitate spectral simulation and assignment of EPR parameters including ( 1 ) H and ( 31 ) P hyperfine couplings .
 Chemical: H1; Chemical: ( 1 ) H; Chemical: ( 31 ) P
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: H1; Chemical: ( 1 ) H; Chemical: ( 31 ) P