Question: the first significant restriction on free immigration in u.s. history was the
[{'answer': 'Naturalization Act of 1790', 'provenance': [{'wikipedia_id': '14762413', 'title': 'History of laws concerning immigration and naturalization in the United States', 'start_paragraph_id': 5, 'start_character': 104, 'end_paragraph_id': 5, 'end_character': 130, 'bleu_score': 1.0, 'section': 'Section::::18th century.\n'}]}, {'answer': 'Chinese Exclusion Act in 1882', 'provenance': [{'wikipedia_id': '14762413', 'title': 'History of laws concerning immigration and naturalization in the United States', 'start_paragraph_id': 11, 'start_character': 140, 'end_paragraph_id': 11, 'end_character': 169, 'bleu_score': 1.0, 'section': 'Section::::19th century.\n'}]}, {'answer': "restricted naturalization to `` free white persons '' of `` good moral character ''"}, {'provenance': [{'wikipedia_id': '14762413', 'title': 'History of laws concerning immigration and naturalization in the United States', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3820160333167322058}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '14762413', 'title': 'History of laws concerning immigration and naturalization in the United States', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 367, 'bleu_score': 0.96746874041754, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3820160333167322058}, 'section': 'Section::::18th century.\n'}]}, {'provenance': [{'wikipedia_id': '14762413', 'title': 'History of laws concerning immigration and naturalization in the United States', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 479, 'bleu_score': 0.865175714815117, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3820160333167322058}, 'section': 'Section::::19th century.\n'}]}, {'provenance': [{'wikipedia_id': '14762413', 'title': 'History of laws concerning immigration and naturalization in the United States', 'section': 'Section::::19th century.\n', 'start_paragraph_id': 11, 'end_paragraph_id': 11, 'meta': {'evidence_span': ['Congress passed the Chinese Exclusion Act in 1882', 'After the immigration of 123,000 Chinese in the 1870s, who joined the 105,000 who had immigrated between 1850 and 1870, Congress passed the Chinese Exclusion Act in 1882 which limited further Chinese immigration.', 'After the immigration of 123,000 Chinese in the 1870s, who joined the 105,000 who had immigrated between 1850 and 1870, Congress passed the Chinese Exclusion Act in 1882 which limited further Chinese immigration.']}}]}]