Question: during which time period did the largest number of former colonies become independent states
[{'answer': 'the 1760s and early 1770s', 'provenance': [{'wikipedia_id': '4721', 'title': 'British Empire', 'start_paragraph_id': 30, 'start_character': 7, 'end_paragraph_id': 30, 'end_character': 32, 'bleu_score': 1.0, 'section': 'Section::::"First" British Empire (1583–1783).:Loss of the Thirteen American Colonies.\n'}]}, {'provenance': [{'wikipedia_id': '4721', 'title': 'British Empire', 'start_paragraph_id': 30, 'start_character': 0, 'end_paragraph_id': 30, 'end_character': 916, 'bleu_score': 0.985764216565234, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9265539385747895281}, 'section': 'Section::::"First" British Empire (1583–1783).:Loss of the Thirteen American Colonies.\n'}]}]