24522
In recent years the use of the opioid oxycodone has increased markedly and replacing morphine as the first - line choice of opioid in several countries .
 Chemical: oxycodone; Chemical: morphine
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: oxycodone; Chemical: morphine