Question: what were the different models of labor used in the british colonies
[{'answer': 'indentured servants', 'provenance': [{'wikipedia_id': '249471', 'title': 'Slavery in the colonial United States', 'start_paragraph_id': 8, 'start_character': 222, 'end_paragraph_id': 8, 'end_character': 241, 'bleu_score': 1.0, 'section': 'Section::::The first enslaved Africans.:Virginia and Chesapeake Bay.\n'}]}, {'answer': 'slaves', 'provenance': [{'wikipedia_id': '249471', 'title': 'Slavery in the colonial United States', 'start_paragraph_id': 2, 'start_character': 5, 'end_paragraph_id': 2, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '249471', 'title': 'Slavery in the colonial United States', 'start_paragraph_id': 40, 'start_character': 0, 'end_paragraph_id': 40, 'end_character': 444, 'bleu_score': 0.69298268724272, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12726186571570671127}, 'section': 'Section::::16th century.\n'}]}]