Assertion: mastiff's dog | /r/AtLocation | britain
Facets:
value: at the time
type: TEMPORAL
Source sentences:
text: The dogs were found in Britain at the time that the Romans invaded the island; they may have been brought there by Phoenician traders as early as the 6th century BC.
text: The dogs were found in Britain at the time that the Romans invaded the island; they may have been brought there by Phoenician traders as early as the 6th century BC.