6929
Finally , PGE foams were shown to be stabilized not only by strong interfacial films but also by agglomerated self - assemblies within the interstitial areas of the foams .
 Chemical: PGE
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: PGE