Assertion: semaphore's arm | /r/HasProperty | frozen into its slot
Facets:
value: during a blizzard
type: TEMPORAL
Source sentences:
text: The Great Northern Railway was the first company to introduce "somersault" signals, mounted away from the post, after an accident in January 1876 when a train passed a signal giving a false "clear" aspect because the signal arm had frozen into its slot during a blizzard.