Assertion: opium's codeine | /r/HasProperty | 0.5%
Facets:
Source sentences:
text: Opium contains more than twenty alkaloids, the principle ones being morphine (10%), narcotine (6%), papaverine (1%) and codeine (0.5%).
text: The important constituents of opium are morphine (10 percent), papaverine (1 percent), codeine (0.5 percent), and thebaine (0.2 percent).