237426
o-Xylene is largely used in the production of phthalic anhydride , and is generally extracted by distillation from a mixed xylene stream in a plant primarily designed for p-xylene production .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None