23246
( 2 ) H and ( 13 ) C spin - lattice relaxation times measured under magic - angle spinning conditions are used to show that the fumarate ion in the desolvate is undergoing small - amplitude motion on a frequency scale of 100s of MHz at ambient temperature with an activation parameter of about 32 kJ mol ( - 1 ) .
 Chemical: ( 2 ) H; Chemical: ( 13 ) C; Chemical: fumarate
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: ( 2 ) H, ( 13 ) C, fumarate 
Answer:
 Chemical: ( 2 ) H; Chemical: ( 13 ) C; Chemical: fumarate