Question: who played buffy the vampire slayer in the movie
[{'answer': 'Kristy Swanson', 'provenance': [{'wikipedia_id': '4231', 'title': 'Buffy the Vampire Slayer (film)', 'start_paragraph_id': 1, 'start_character': 105, 'end_paragraph_id': 1, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4231', 'title': 'Buffy the Vampire Slayer (film)', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 43, 'bleu_score': 0.6147881529512641, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12637261365959980999}, 'section': 'Section::::Cast.\n'}]}, {'provenance': [{'wikipedia_id': '4231', 'title': 'Buffy the Vampire Slayer (film)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 833, 'bleu_score': 0.826818864203373, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12637261365959980999}, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '47542', 'title': 'Buffy the Vampire Slayer', 'section': 'Section::::Production.:Origins.\n', 'start_paragraph_id': 34, 'end_paragraph_id': 34, 'meta': {'evidence_span': ['The idea was first visited through Whedon\'s script for the 1992 movie "Buffy the Vampire Slayer", which featured Kristy Swanson in the title role.', 'The idea was first visited through Whedon\'s script for the 1992 movie "Buffy the Vampire Slayer", which featured Kristy Swanson in the title role.', 'Kristy Swanson']}}]}, {'provenance': [{'wikipedia_id': '40648', 'title': 'Buffy Summers', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Buffy was portrayed by Kristy Swanson in the film', 'Kristy Swanson']}}]}, {'provenance': [{'wikipedia_id': '4231', 'title': 'Buffy the Vampire Slayer (film)', 'section': 'Section::::Plot.\n', 'start_paragraph_id': 3, 'end_paragraph_id': 3, 'meta': {'evidence_span': ['High school senior Buffy Summers (Kristy Swanson) attends Hemery High School in Los Angeles; her main concerns are shopping and spending time with her rich, snooty friends and her boyfriend, Jeffrey (Randall Batinkoff).', 'Kristy Swanson']}}]}]