4941
The present study explores the effectiveness of granular AC ( GAC ) in extracting polycyclic aromatic hydrocarbon ( PAH ) from highly contaminated sediments .
 Chemical: polycyclic aromatic hydrocarbon; Chemical: PAH
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: polycyclic aromatic hydrocarbon; Chemical: PAH