19543
The stimulation occurs in two steps , with approximately eightfold stimulation by N - terminal cleavage , approximately fourfold stimulation by C - terminal cleavage , and 23 - fold stimulation by the cleavage of both termini , compared to the pro - form with both the N - and C - terminal pro - sequences .
 Chemical: N; Chemical: C; Chemical: N; Chemical: C
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, C, N, C 
Answer:
 Chemical: N; Chemical: C; Chemical: N; Chemical: C