Question: what do the colors in the olympic rings stand for
[{'answer': "every competing nation 's flag", 'provenance': [{'wikipedia_id': '731192', 'title': 'Olympic symbols', 'start_paragraph_id': 5, 'start_character': 442, 'end_paragraph_id': 5, 'end_character': 474, 'bleu_score': 1.0, 'section': 'Section::::Rings.\n'}]}, {'provenance': [{'wikipedia_id': '731192', 'title': 'Olympic symbols', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 587, 'bleu_score': 0.671245908527996, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3093464009140301835}, 'section': 'Section::::Rings.\n'}]}]