24958
In the present study , in situ microcosms consisting of activated carbon pellets ( BACTRAP (R) s ) were loaded with either ( 13 ) C - naphthalene or ( 13 ) C - fluorene and were subsequently exposed in the contaminant source and plume fringe region of an PAH contaminated aquifer .
 Chemical: carbon; Chemical: ( 13 ) C - naphthalene; Chemical: ( 13 ) C - fluorene; 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: carbon; Chemical: ( 13 ) C - naphthalene; Chemical: ( 13 ) C - fluorene; Chemical: PAH