7698
N - formyl peptide receptors ( FPRs ) are G protein - coupled receptors ( GPCRs ) that play critical roles in inflammatory reactions , and FPR - specific interactions can possibly be used to facilitate the resolution of pathological inflammatory reactions .
 Chemical: N - formyl
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: N - formyl 
Answer:
 Chemical: N - formyl