11414
These findings suggest that the protection provided by PGE2 is a result of the modulation of early lung immunomodulatory mechanisms , and possibly a shift in the balance of dendritic cells towards a tolerogenic profile .
 Chemical: PGE2
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: PGE2