Question: how old was ruth in the bible when she married boaz
[{'answer': 'forty years old', 'provenance': [{'wikipedia_id': '157116', 'title': 'Boaz', 'start_paragraph_id': 21, 'start_character': 1509, 'end_paragraph_id': 21, 'end_character': 1524, 'bleu_score': 1.0, 'section': 'Section::::Rabbinic Jewish tradition.:Boaz and Ruth.\n'}]}, {'provenance': [{'wikipedia_id': '157116', 'title': 'Boaz', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 1670, 'bleu_score': 0.978491158581799, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8133778475476365777}, 'section': 'Section::::Rabbinic Jewish tradition.:Boaz and Ruth.\n'}]}]