21502
Amongst the common volatile organic compounds ( VOCs ) identified between levoglucosan , abietic acid , and nitroguaiacol were methanol , acetaldehyde , formic acid , and acetic acid .
 Chemical: levoglucosan; Chemical: abietic acid; Chemical: nitroguaiacol; Chemical: methanol; Chemical: acetaldehyde; Chemical: formic acid; Chemical: acetic acid
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: levoglucosan, abietic acid, nitroguaiacol, methanol, acetaldehyde, formic acid, acetic acid 
Answer:
 Chemical: levoglucosan; Chemical: abietic acid; Chemical: nitroguaiacol; Chemical: methanol; Chemical: acetaldehyde; Chemical: formic acid; Chemical: acetic acid