Question: what is the population of port arthur texas
[{'answer': '53,818', 'provenance': [{'wikipedia_id': '151211', 'title': 'Port Arthur, Texas', 'start_paragraph_id': 2, 'start_character': 34, 'end_paragraph_id': 2, 'end_character': 40, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '151211', 'title': 'Port Arthur, Texas', 'start_paragraph_id': 2, 'start_character': 4, 'end_paragraph_id': 2, 'end_character': 463, 'bleu_score': 0.9025615293670031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7254584871491205713}, 'section': 'Section::::Abstract.'}]}]