Question: what does ap class mean in high school
[{'answer': 'Advanced Placement', 'provenance': [{'wikipedia_id': '291422', 'title': 'Advanced Placement', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '291422', 'title': 'Advanced Placement', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 739, 'bleu_score': 0.984188478234951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4340255908848844714}, 'section': 'Section::::Abstract.'}]}]