Question: how do we measure the distance to other galaxies
[{'answer': 'cosmic distance ladder', 'provenance': [{'wikipedia_id': '471487', 'title': 'Cosmic distance ladder', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '471487', 'title': 'Cosmic distance ladder', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 640, 'bleu_score': 0.9796927878356411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15076727455032626584}, 'section': 'Section::::Abstract.'}]}]