Question: where does the st. johns river begin and end
[{'answer': 'Indian River County', 'provenance': [{'wikipedia_id': '437829', 'title': 'St. Johns River', 'start_paragraph_id': 1, 'start_character': 545, 'end_paragraph_id': 1, 'end_character': 564, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the Atlantic Ocean at Duval County'}, {'provenance': [{'wikipedia_id': '437829', 'title': 'St. Johns River', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 563, 'bleu_score': 0.9228526011015631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3801117968547913908}, 'section': 'Section::::Geography and ecology.\n'}]}]