Assertion: detonator | /r/AtLocation | the direction
Facets:
value: from the failed train
type: LOCATION
Source sentences:
text: This is used when a failed train has to be assisted forward by another, and the detonators will be placed 300 metres from the failed train, in the direction from which the assistance is arriving or both ways if that isn't known, to warn the Driver of the assisting train that he is approaching the location.