Question: who is opening for taylor swift on reputation tour
[{'answer': 'Camila Cabello', 'provenance': [{'wikipedia_id': '55785385', 'title': "Taylor Swift's Reputation Stadium Tour", 'start_paragraph_id': 1, 'start_character': 510, 'end_paragraph_id': 1, 'end_character': 524, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Charli XCX', 'provenance': [{'wikipedia_id': '55785385', 'title': "Taylor Swift's Reputation Stadium Tour", 'start_paragraph_id': 1, 'start_character': 498, 'end_paragraph_id': 1, 'end_character': 508, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]