Assertion: captivity's tank | /r/HasProperty | devoid of feature
Facets:
Source sentences:
text: Unlike the existing flat-walled tanks, which are devoid of any features, the new pools were set to have objects that could be attached to the bottom - puzzles of sorts, for the orcas to interact with - as well as a giant turbine propelling water so that the orcas could swim against the flow.