Question: who was in england before the anglo saxons
[{'answer': 'The Britons', 'provenance': [{'wikipedia_id': '2208391', 'title': 'Celtic Britons', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2208391', 'title': 'Celtic Britons', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 355, 'bleu_score': 0.9645876452711911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15130220716840530459}, 'section': 'Section::::Abstract.'}]}]