Assertion: amphetamine | /r/CapableOf | improve concentration
Facets:
value: noticeably
type: MANNER
Source sentences:
text: Amphetamines are stimulant drugs that improve concentration, reduce appetite, and help keep users awake.
text: Instead of making them even more jittery, as might be expected, the amphetamines calm many of these children and noticeably improve their concentration and performance," commented the authors of the article.