4939
Extraction of sediment - associated polycyclic aromatic hydrocarbons with granular activated carbon .
 Chemical: polycyclic aromatic hydrocarbons; Chemical: carbon
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 hydrocarbons; Chemical: carbon