Assertion: sofa's cushion | /r/HasAspect | straight sides
Facets:
Source sentences:
text: Square or rectangular cushions have straight sides, unlike the irregular shape of T-cushions.
text: Since sofas have more than one cushion, each of the T-cushions are only half the 'T.' The 'T' part of the cushion is next to each arm, and the cushions have one straight side to fit against the next cushion.