Question: who discovered the heating effect of electric current
[{'answer': 'James Prescott Joule', 'provenance': [{'wikipedia_id': '604798', 'title': 'Joule heating', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '604798', 'title': 'Joule heating', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 529, 'bleu_score': 0.978138775770484, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11026803499838036000}, 'section': 'Section::::History.\n'}]}]