3699
The present results thus suggest that intra - arterial PGE2 , given near the bladder , may initiate micturition in the normal rat chiefly by directly contracting the smooth muscle of the detrusor .
 Chemical: PGE2
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: PGE2