Assertion: cerebrospinal fluid | /r/CapableOf | provide pain relief
Facets:
value: for as long as 2 hours
type: TEMPORAL
Source sentences:
text: In this procedure, a narcotic or anesthetics such as fentanyl, bupivacaine or lidocaine is injected below the spinal column directly into the spinal fluid, which provides pain relief for as long as 2 hours.