Question: how many episodes of this is us in season two
[{'answer': '18', 'provenance': [{'wikipedia_id': '55143891', 'title': 'This Is Us (season 2)', 'start_paragraph_id': 3, 'start_character': 33, 'end_paragraph_id': 3, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55143891', 'title': 'This Is Us (season 2)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 227, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11619061418005041524}, 'section': 'Section::::Abstract.'}]}]