5920
For each of four proteins , three independently determined X - ray structures of differing crystallographic resolution were used to predict exchange for the static solvent - exposed amide hydrogens .
 Chemical: amide hydrogens
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: amide hydrogens