Question: when did the uk and us become allies
[{'answer': '1940', 'provenance': [{'wikipedia_id': '1814362', 'title': 'United Kingdom–United States relations', 'start_paragraph_id': 1, 'start_character': 304, 'end_paragraph_id': 1, 'end_character': 308, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Since 1940', 'provenance': [{'wikipedia_id': '1814362', 'title': 'United Kingdom–United States relations', 'start_paragraph_id': 1, 'start_character': 298, 'end_paragraph_id': 1, 'end_character': 308, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1814362', 'title': 'United Kingdom–United States relations', 'start_paragraph_id': 1, 'start_character': 133, 'end_paragraph_id': 1, 'end_character': 421, 'bleu_score': 0.7523634340221501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12307336798035327378}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1814362', 'title': 'United Kingdom–United States relations', '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': 12307336798035327378}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5199', 'title': 'CanadaUnited States relations', 'section': 'Section::::History.:World War II.\n', 'start_paragraph_id': 52, 'end_paragraph_id': 52, 'meta': {'evidence_span': ["The two nations cooperated closely in World War II, as both nations saw new levels of prosperity and a determination to defeat the Axis powers. Prime Minister William Lyon Mackenzie King and President Franklin D. Roosevelt were determined not to repeat the mistakes of their predecessors. They met in August 1940 at Ogdensburg, issuing a declaration calling for close cooperation, and formed the Permanent Joint Board on Defense (PJBD). King sought to raise Canada's international visibility by hosting the August 1943 Quadrant conference in Quebec on military and political strategy; he was a gracious host but was kept out of the important meetings by Winston Churchill and", "The two nations cooperated closely in World War II, as both nations saw new levels of prosperity and a determination to defeat the Axis powers. Prime Minister William Lyon Mackenzie King and President Franklin D. Roosevelt were determined not to repeat the mistakes of their predecessors. They met in August 1940 at Ogdensburg, issuing a declaration calling for close cooperation, and formed the Permanent Joint Board on Defense (PJBD). King sought to raise Canada's international visibility by hosting the August 1943 Quadrant conference in Quebec on military and political strategy; he was a gracious host but was kept out of the important meetings by Winston Churchill and", 'The two nations cooperated closely in World War II, as both nations saw new levels of prosperity and a determination to defeat the Axis powers. Prime Minister William Lyon Mackenzie King and President Franklin D. Roosevelt were determined not to repeat the mistakes of their predecessors. They met in August 1940 at Ogdensburg, issuing a declaration calling for close cooperation, and formed the Permanent Joint Board on Defense (PJBD).']}}]}, {'provenance': [{'wikipedia_id': '1814362', 'title': 'United KingdomUnited States relations', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['United KingdomUnited States relations, also referred to as BritishAmerican relations or Anglo-American relations, is the bilateral relations between the United Kingdom and the United States. Relations encompass many complex relations ranging from two early wars to competition for world markets. Since 1940 they have been close military allies enjoying the Special Relationship built as wartime allies and NATO partners.', 'United KingdomUnited States relations, also referred to as BritishAmerican relations or Anglo-American relations, is the bilateral relations between the United Kingdom and the United States. Relations encompass many complex relations ranging from two early wars to competition for world markets. Since 1940 they have been close military allies enjoying the Special Relationship built as wartime allies and NATO partners.', 'Relations encompass many complex relations ranging from two early wars to competition for world markets. Since 1940 they have been close military allies enjoying the Special Relationship built as wartime allies and NATO partners.']}}]}]