Question: when did the channel tunnel rail link open
[{'answer': '16 September 2003', 'provenance': [{'wikipedia_id': '5702', 'title': 'Channel Tunnel', 'start_paragraph_id': 39, 'start_character': 178, 'end_paragraph_id': 39, 'end_character': 195, 'bleu_score': 1.0, 'section': 'Section::::Origins.:Completion.\n'}]}, {'provenance': [{'wikipedia_id': '5702', 'title': 'Channel Tunnel', 'start_paragraph_id': 39, 'start_character': 0, 'end_paragraph_id': 39, 'end_character': 604, 'bleu_score': 0.877281949268619, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10756895645526568515}, 'section': 'Section::::Origins.:Completion.\n'}]}]