Assertion: adhd's symptom | /r/HasProperty | difficult to define
Facets:
value: in adults
type: TEMPORAL
Source sentences:
text: The symptoms can be difficult to define, as it is hard to draw a line at where normal levels of inattention, hyperactivity, and impulsivity end and significant levels requiring interventions begin.
text: In adults, the symptoms of ADHD are more difficult to define.