Question: who has topped the 28th annual world billionaires list of forbes released on 3rd march 2014
[{'answer': 'Bill Gates', 'provenance': [{'wikipedia_id': '42159950', 'title': "The World's Billionaires 2014", 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 10, 'bleu_score': 1.0, 'section': 'Section::::Annual list.\n'}]}, {'provenance': [{'wikipedia_id': '42159950', 'title': "The World's Billionaires 2014", 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 884, 'bleu_score': 0.9636095698531311, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13078883405873303615}, 'section': 'Section::::Annual list.\n'}]}]