Question: what was the world population in the year 1900
[{'answer': '1.6 billion', 'provenance': [{'wikipedia_id': '19017269', 'title': 'World population', 'start_paragraph_id': 36, 'start_character': 302, 'end_paragraph_id': 36, 'end_character': 313, 'bleu_score': 1.0, 'section': 'Section::::Fluctuation.\n'}]}, {'provenance': [{'wikipedia_id': '19017269', 'title': 'World population', 'start_paragraph_id': 36, 'start_character': 0, 'end_paragraph_id': 36, 'end_character': 594, 'bleu_score': 0.978138775770484, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7008745755215398480}, 'section': 'Section::::Fluctuation.\n'}]}]