Question: the current value in the arc welding is decided by
[{'answer': 'the amount of heat input', 'provenance': [{'wikipedia_id': '440996', 'title': 'Arc welding', 'start_paragraph_id': 4, 'start_character': 326, 'end_paragraph_id': 4, 'end_character': 350, 'bleu_score': 1.0, 'section': 'Section::::Power supplies.\n'}]}, {'provenance': [{'wikipedia_id': '440996', 'title': 'Arc welding', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 1379, 'bleu_score': 0.991360488753344, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16781268155645100108}, 'section': 'Section::::Power supplies.\n'}]}]