Question: when was the last time vancouver had an earthquake
[{'answer': '1946', 'provenance': [{'wikipedia_id': '17896152', 'title': '1946 Vancouver Island earthquake', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 4, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '17896152', 'title': '1946 Vancouver Island earthquake', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8315446115037468751}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '17896152', 'title': '1946 Vancouver Island earthquake', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['The 1946 Vancouver Island earthquake struck Vancouver Island on the Coast of British Columbia, Canada, on June 23 at 10:15\xa0a.m. with a magnitude estimated at 7.0 and 7.5 .', '1946', 'The 1946 Vancouver Island earthquake struck Vancouver Island']}}]}, {'provenance': [{'wikipedia_id': '17896152', 'title': '1946 Vancouver Island earthquake', 'section': 'Section::::Damage and casualties.\n', 'start_paragraph_id': 10, 'end_paragraph_id': 10, 'meta': {'evidence_span': ['1946, soon after the earthquake, and these photographs were eventually studied by a geoscientist in the late 1970s. South of the CanadaUnited States border in Washington State, some chimneys fell at Eastsound on Orcas Island and a concrete mill was damaged at Port Angeles.', '1946', '1946, soon after the earthquake, and these photographs were eventually studied b']}}]}, {'provenance': [{'wikipedia_id': '53099', 'title': 'Vancouver Island', 'section': 'Section::::Geology.\n', 'start_paragraph_id': 39, 'end_paragraph_id': 39, 'meta': {'evidence_span': ['he area has been known to host megathrust earthquakes in the past, the last occurring in 1700. In 1946, the Forbidden Plateau in the east of the Vancouver Island Ranges was the epicentre of an earthquake that registered 7.3 on the Richter magnitude scale, the strongest ever recorded on land in Canada.', 'In 1946, the Forbidden Plateau in the east of the Vancouver Island']}}]}]