Assertion: seesaw's member | /r/HasProperty | seat
Facets:
Source sentences:
text: A swinging seesaw comprising a support, an elongated seat-carrying member, a seat carried thereby and means interconnecting said support and said member at a plurality of points spaced along the latter whereby the seat-carrying portion of the latter may twist axially to and from a normally stationary, central position as it swings to either side of the latter said means including a resilient portion so that said seat-carrying portion may simultaneously oscillate substantially vertically under the weight of a rider carried thereby.