Question: who's face is on the 50 dollar bill
[{'answer': 'Ulysses S. Grant', 'provenance': [{'wikipedia_id': '477347', 'title': 'United States fifty-dollar bill', 'start_paragraph_id': 1, 'start_character': 122, 'end_paragraph_id': 1, 'end_character': 138, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '477347', 'title': 'United States fifty-dollar bill', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 272, 'bleu_score': 0.9569637990759251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16362771079631466468}, 'section': 'Section::::Abstract.'}]}]