Assertion: policeman | /r/AtLocation | their feet
Facets:
value: often
type: TEMPORAL
value: for long periods of time
type: TEMPORAL
Source sentences:
text: Mental and physical stamina: Officers and their K-9 companions must be alert throughout their shifts and often must be on their feet for long periods of time.
text: Officers and their K-9 companions must be alert throughout their shifts and often must be on their feet for long periods of time.