Assertion: classical shipwreck | /r/HasProperty | hidden by natural features
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Classical-era shipwrecks are difficult to discern with sonar, as they sit close to the seabed and can often be hidden by natural features.
text: Classical-era shipwrecks are difficult to discern with sonar, as they sit close to the seabed and can often be hidden by natural features.