Assertion: bullying | /r/HasProperty | difficult challenge
Facets:
value: often
type: TEMPORAL
value: for trained school staff
type: TRANSITIVE-OBJECT
Source sentences:
text: But bullying prevention is a difficult challenge.
text: However, bullying problems are often complex and difficult to handle, even for trained school staff.
text: Bullying is a behavior that is often difficult to measure, but is something that we all think we know when we see it.