6932
Backbone 15N relaxation data of the dimeric RBD are analyzed with the model - free ( MF ) method , and with the slowly relaxing local structure / molecular dynamics ( SRLS - MD ) approach .
 Chemical: 15N
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: 15N