10844
The presence of such weak molecular interactions in the solution state is convincingly established by one and two - dimensional ( 1 ) H , ( 19 ) F , and natural abundant ( 15 ) N NMR spectroscopic studies .
 Chemical: ( 1 ) H; Chemical: ( 19 ) F; Chemical: ( 15 ) N
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: ( 1 ) H, ( 19 ) F, ( 15 ) N 
Answer:
 Chemical: ( 1 ) H; Chemical: ( 19 ) F; Chemical: ( 15 ) N