19721
Caddisfly larval silk is a fibroin protein based biopolymer containing mostly repetitive amino acid motifs .
 Chemical: amino acid
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: amino acid 
Answer:
 Chemical: amino acid