Assertion: shark's source | /r/HasProperty | martin
Facets:
Source sentences:
text: They can be seen near the surface or near the bottom of the sea, as far deep as 820 feet (250 meters), but they're rarely seen in the middle of those two extremes [source: Martins, Knickle].
text: Whenever an object was presented by itself, the great white went to investigate -- one reason why swimmers are warned not to go into shark-infested waters alone [source: Martins,