Question: who does ginny hex on the hogwarts express in harry potter and the half-blood prince
[{'answer': 'Zacharias Smith', 'provenance': [{'wikipedia_id': '23900788', 'title': 'Ginny Weasley', 'start_paragraph_id': 8, 'start_character': 61, 'end_paragraph_id': 8, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Appearances.\n'}]}, {'provenance': [{'wikipedia_id': '23900788', 'title': 'Ginny Weasley', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 1315, 'bleu_score': 0.990761877194105, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15830188232610244520}, 'section': 'Section::::Appearances.\n'}]}]