Question: how many journeys are made on britain’s railway network each year
[{'answer': '1,718 million', 'provenance': [{'wikipedia_id': '4384', 'title': 'Rail transport in Great Britain', 'start_paragraph_id': 21, 'start_character': 60, 'end_paragraph_id': 21, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Passenger services.\n'}]}, {'provenance': [{'wikipedia_id': '4384', 'title': 'Rail transport in Great Britain', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 393, 'bleu_score': 0.865308718873656, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 887316259265944415}, 'section': 'Section::::Passenger services.\n'}]}]