Question: who ordered the blockade of southern ports during the civil war
[{'answer': 'President Abraham Lincoln', 'provenance': [{'wikipedia_id': '1984020', 'title': 'Union blockade', 'start_paragraph_id': 2, 'start_character': 31, 'end_paragraph_id': 2, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1984020', 'title': 'Union blockade', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 546, 'bleu_score': 0.9186679390018001, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7530384100986724806}, 'section': 'Section::::Abstract.'}]}]