Assertion: tram's track | /r/MadeOf | anchored perpendicular
Facets:
value: to maintain a consistent distance
type: PURPOSE
value: to members
type: TRANSITIVE-OBJECT
Source sentences:
text: Track consists of two parallel steel rails, anchored perpendicular to members called ties (sleepers) of timber, concrete, steel, or plastic to maintain a consistent distance apart, or rail gauge.