Assertion: nightmare's cause | /r/HasProperty | the disease
Facets:
value: to deliver the drug
type: PURPOSE
Source sentences:
text: The first, where levodopa gives anywhere from some relief to almost complete reduction of symptoms, and a second, where the levodopa itself causes motor complications (though this itself is still controversial; perhaps the cause is actually the disease itself or even the nature of levodopa pills to deliver the drug in bursts).