Question: who plays spencer hastings in pretty little liars
[{'answer': 'Troian Avery Bellisario', 'provenance': [{'wikipedia_id': '25373967', 'title': 'Troian Bellisario', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '25373967', 'title': 'Troian Bellisario', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 162, 'bleu_score': 0.75905983061988, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6685097027661852782}, 'section': 'Section::::Abstract.'}]}]