Question: which is the longer of the two signals used in the morse code
[{'answer': 'dash', 'provenance': [{'wikipedia_id': '18935', 'title': 'Morse code', 'start_paragraph_id': 1, 'start_character': 176, 'end_paragraph_id': 1, 'end_character': 180, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18935', 'title': 'Morse code', 'start_paragraph_id': 2, 'start_character': 245, 'end_paragraph_id': 2, 'end_character': 1027, 'bleu_score': 0.6406768225814651, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 494867940466550967}, 'section': 'Section::::Abstract.'}]}]