Assertion: upper quadrant semaphore | /r/CapableOf | supplant lower quadrant signals
Facets:
value: almost totally
type: DEGREE
value: in great britain
type: LOCATION
value: from the 1920s
type: TEMPORAL
value: except on former gwr lines
type: OTHER
Source sentences:
text: From the 1920s onwards, upper quadrant semaphores almost totally supplanted lower quadrant signals in Great Britain, except on former GWR lines.