19720
In this study , we use ( 13 ) C and ( 31 ) P solid - state NMR and wide angle X - ray diffraction ( WAXD ) as tools to elucidate molecular protein structure of caddisfly larval silk from the species Hesperophylax consimilis .
 Chemical: ( 13 ) C; 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: ( 13 ) C; Chemical: ( 31 ) P