Question: who was the first european to set foot on north america
[{'answer': 'Leif Erikson or Leif Ericson', 'provenance': [{'wikipedia_id': '146803', 'title': 'Leif Erikson', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '146803', 'title': 'Leif Erikson', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 566, 'bleu_score': 0.9203951459836621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14243050876179249934}, 'section': 'Section::::Abstract.'}]}]