Question: when did the first slavs get to eastern europe
[{'answer': 'Around the 6th century', 'provenance': [{'wikipedia_id': '29440', 'title': 'Slavs', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::History and origins.:Migrations.\n'}]}, {'provenance': [{'wikipedia_id': '29440', 'title': 'Slavs', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 453, 'bleu_score': 0.8098157542363411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8682498666872822185}, 'section': 'Section::::History and origins.:Migrations.\n'}]}]