Question: when did the stop the boats campaign start
[{'answer': '2013', 'provenance': [{'wikipedia_id': '40554984', 'title': 'Operation Sovereign Borders', 'start_paragraph_id': 1, 'start_character': 206, 'end_paragraph_id': 1, 'end_character': 210, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '40554984', 'title': 'Operation Sovereign Borders', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 379, 'bleu_score': 0.965203995518735, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13974323196227753869}, 'section': 'Section::::Background.\n'}]}]