5435
Eastern and western coastal sediments contained higher levels of LABs but lower levels of PAHs than those of the Pearl River Estuary , a coastal area of the Pearl River Delta .
 Chemical: LABs; Chemical: PAHs
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: LABs; Chemical: PAHs