Question: where are the nfl games played in london
[{'answer': 'Wembley Stadium', 'provenance': [{'wikipedia_id': '15558076', 'title': 'NFL International Series', 'start_paragraph_id': 2, 'start_character': 70, 'end_paragraph_id': 2, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Twickenham Stadium', 'provenance': [{'wikipedia_id': '15558076', 'title': 'NFL International Series', 'start_paragraph_id': 2, 'start_character': 311, 'end_paragraph_id': 2, 'end_character': 329, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': "Tottenham Hotspur 's new stadium at Northumberland Park"}, {'provenance': [{'wikipedia_id': '15558076', 'title': 'NFL International Series', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 540, 'bleu_score': 0.7043396981798661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13412726756041847186}, 'section': 'Section::::Abstract.'}]}]