3697
Intra - arterially given PGE2 produced a distinct increase in bladder pressure before initiating a micturition reflex , indicating that the PG had a direct contractant effect on the detrusor smooth muscle .
 Chemical: PGE2; Chemical: PG
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; Chemical: PG