23378
Only small amounts of PCB 136 partitioned into hippocampal tissue slices and no OH - PCB metabolites were detected .
 Chemical: PCB 136; Chemical: OH - PCB
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: PCB 136; Chemical: OH - PCB