Question: what does the crescent moon on the pakistan flag mean
[{'answer': 'progress', 'provenance': [{'wikipedia_id': '374010', 'title': 'Flag of Pakistan', 'start_paragraph_id': 2, 'start_character': 1152, 'end_paragraph_id': 2, 'end_character': 1160, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]