Assertion: mm | /r/HasProperty | 8 1⁄ 2
Facets:
Source sentences:
text: 1,435 mm ( 4 ft 8 1⁄ 2 in ) standard gauge
text: Various sizes of track gauge exist around the world and the normal O gauge track represents the Standard gauge of 1,435 mm (4 ft 8 1⁄ 2 in).