Assertion: breakwater | /r/HasProperty | built on either side of a river mouth
Facets:
value: something that is
type: OTHER
value: often
type: TEMPORAL
value: to keep the navigation channel
type: PURPOSE
Source sentences:
text: It is often built on either side of a river mouth to keep the navigation channel open.
text: As the breakwater system remains in the seabed at ordinary times, it enables breakwaters to be constructed at port entrances and the mouths of rivers, something that is impossible to do with conventional breakwaters because they would block sea traffic.