Question: when did congress first began to regulate immigration
[{'answer': '1882', 'provenance': [{'wikipedia_id': '3414996', 'title': 'Immigration Act of 1882', 'start_paragraph_id': 0, 'start_character': 19, 'end_paragraph_id': 0, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3414996', 'title': 'Immigration Act of 1882', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 536, 'bleu_score': 0.977897140678983, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18007363763169809979}, 'section': 'Section::::Abstract.'}]}]