20523
It has been observed that the blood level of opioids in postmortem analyses of addicts , who consumed ethanol along with the opioid , was much less than that observed in individuals that died from opioids alone .
 Chemical: ethanol
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: ethanol