8127
Five PAHs - phenanthrene , fluorene , fluoranthene , pyrene , and benzo [ a ] pyrene - and four heavy metals at different concentrations - 0 . 05 to 0 . 1 micro g Cd ( 2 + ) ml ( - 1 ) , 0 . 05 to 1 micro g Cu ( 2 + ) ml ( - 1 ) , 0 . 05 to 1 micro g Zn ( 2 + ) ml ( - 1 ) , and 0 . 5 to 2 . 5 micro g Ni ( 2 + ) ml ( - 1 ) - were examined .
 Chemical: PAHs; Chemical: phenanthrene; Chemical: fluorene; Chemical: fluoranthene; Chemical: pyrene; Chemical: benzo [ a ] pyrene; Chemical: Cd ( 2 + ); Chemical: Cu ( 2 + ); Chemical: Zn ( 2 + ); Chemical: Ni ( 2 + )
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: PAHs, phenanthrene, fluorene, fluoranthene, pyrene, benzo [ a ] pyrene, Cd ( 2 + ), Cu ( 2 + ), Zn ( 2 + ), Ni ( 2 + ) 
Answer:
 Chemical: PAHs; Chemical: phenanthrene; Chemical: fluorene; Chemical: fluoranthene; Chemical: pyrene; Chemical: benzo [ a ] pyrene; Chemical: Cd ( 2 + ); Chemical: Cu ( 2 + ); Chemical: Zn ( 2 + ); Chemical: Ni ( 2 + )