Question: where does the thames river begin and end
[{'answer': 'Lighthouse Cove', 'provenance': [{'wikipedia_id': '6023152', 'title': 'Thames River (Ontario)', 'start_paragraph_id': 2, 'start_character': 143, 'end_paragraph_id': 2, 'end_character': 158, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Near Tavistock'}, {'provenance': [{'wikipedia_id': '6023152', 'title': 'Thames River (Ontario)', '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': 5213011092414275079}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6023152', 'title': 'Thames River (Ontario)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 199, 'bleu_score': 0.6805532045261381, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5213011092414275079}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6023152', 'title': 'Thames River (Ontario)', 'section': 'Section::::Abstract.', 'start_paragraph_id': 2, 'end_paragraph_id': 2, 'meta': {'evidence_span': ['The Thames flows west through southwestern Ontario, from the Town of Tavistock westward through the cities of Woodstock, London and Chatham to Lighthouse Cove on Lake St. Clair.', 'The Thames flows west through southwestern Ontario, from the Town of Tavistock westward through the cities of Woodstock, London and Chatham to Lighthouse Cove on Lake St. Clair. Its drainage basin is .', 'Lighthouse Cove']}}]}, {'provenance': [{'wikipedia_id': '6023152', 'title': 'Thames River (Ontario)', 'section': 'Section::::Abstract.', 'start_paragraph_id': 3, 'end_paragraph_id': 3, 'meta': {'evidence_span': ['The Thames River is located in southwestern Ontario, Canada. The Thames flows west through southwestern Ontario, from the Town of Tavistock westward through the cities of Woodstock, London and Chatham to Lighthouse Cove on Lake St. Clair.', 'The Thames River is located in southwestern Ontario, Canada. The Thames flows west through southwestern Ontario, from the Town of Tavistock westward through the cities of Woodstock, London and Chatham to Lighthouse Cove on Lake St. Clair. Its drainage basin is . Known as Deshkan Ziibi (Antler River) in Anishnaabemowin, the Ojibwe language spoken by Anishnaabe peoples, who together with the Neutrals have lived in the area since before Europeans arrived. In 1793, the river was renamed after the River Thames in England by Lieutenant Governor John Graves Simcoe.', 'Lighthouse Cove']}}]}]