Question: what is the meaning of f in f4 in meteor garden
[{'answer': 'Flower 4', 'provenance': [{'wikipedia_id': '612940', 'title': 'Meteor Garden', 'start_paragraph_id': 6, 'start_character': 354, 'end_paragraph_id': 6, 'end_character': 362, 'bleu_score': 1.0, 'section': 'Section::::Synopsis.\n'}]}, {'provenance': [{'wikipedia_id': '612940', 'title': 'Meteor Garden', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 583, 'bleu_score': 0.9325152759335561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16359770226759204148}, 'section': 'Section::::Synopsis.\n'}]}]