Assertion: coffee's caffeine | /r/HasAspect | variable effects
Facets:
value: on learning
type: TRANSITIVE-OBJECT
value: at normal doses
type: TEMPORAL
value: on memory
type: TRANSITIVE-OBJECT
Source sentences:
text: At normal doses, caffeine has variable effects on learning and memory, but it generally improves reaction time, wakefulness, concentration, and motor coordination.