Assertion: military shipwreck | /r/HasProperty | sunk in an area of the potomac river
Facets:
value: in maryland
type: LOCATION
value: over centuries
type: TEMPORAL
value: deliberately
type: MANNER
Source sentences:
text: Nearly 200 military shipwrecks — dating as far back as the Revolutionary War and including ships from the Civil War and both World War I and World War II — were deliberately sunk over centuries, in an area of the Potomac River called Mallows Bay, in Maryland.