25404
The use of poplar and hickory led to a decrease in the PAH contents in the range of 35 - 55 % compared to the commonly used beech wood .
 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: PAH