Question: lightning arresters are used in power systems to protect electrical equipments against
[{'answer': 'the damaging effects of lightning', 'provenance': [{'wikipedia_id': '743458', 'title': 'Lightning arrester', 'start_paragraph_id': 1, 'start_character': 229, 'end_paragraph_id': 1, 'end_character': 262, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '743458', 'title': 'Lightning arrester', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 542, 'bleu_score': 0.976327165973018, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5297857092014738033}, 'section': 'Section::::Abstract.'}]}]