Question: who was the first european to reach what is now the us mainland
[{'answer': 'Giovanni Caboto', 'provenance': [{'wikipedia_id': '24490545', 'title': 'Exploration of North America', 'start_paragraph_id': 8, 'start_character': 31, 'end_paragraph_id': 8, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::Age of Discovery and the search for the Northwest Passage.\n'}]}, {'provenance': [{'wikipedia_id': '24490545', 'title': 'Exploration of North America', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 467, 'bleu_score': 0.9738505480425671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7225201064751154408}, 'section': 'Section::::Age of Discovery and the search for the Northwest Passage.\n'}]}]