Question: who is the founder of facebook social network
[{'answer': 'Mark Zuckerberg', 'provenance': [{'wikipedia_id': '27951979', 'title': 'History of Facebook', 'start_paragraph_id': 1, 'start_character': 148, 'end_paragraph_id': 1, 'end_character': 163, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '27951979', 'title': 'History of Facebook', 'start_paragraph_id': 1, 'start_character': 109, 'end_paragraph_id': 1, 'end_character': 592, 'bleu_score': 0.895935360288288, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14629662687675770694}, 'section': 'Section::::Abstract.'}]}]