Assertion: track's gauge | /r/HasProperty | possible
Facets:
Source sentences:
text: If the difference between the two gauges is large enough, for example between 1,435 mm (4 ft 8 1⁄ 2 in) standard gauge and 3 ft 6 in (1,067 mm), three-rail dual-gauge is possible, but if not, for example between 3 ft 6 in (1,067 mm) and 1,000 mm (3 ft 3 3⁄ 8 in) metre gauge, four-rail triple-gauge is used.