Question: what is the steps of a ladder called
[{'answer': 'rungs', 'provenance': [{'wikipedia_id': '147518', 'title': 'Ladder', 'start_paragraph_id': 1, 'start_character': 42, 'end_paragraph_id': 1, 'end_character': 47, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '147518', 'title': 'Ladder', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 586, 'bleu_score': 0.9812185674664711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6795809825093780545}, 'section': 'Section::::Abstract.'}]}]