Question: what do the colours of the olympic rings mean
[{'answer': 'Africa', 'provenance': [{'wikipedia_id': '731192', 'title': 'Olympic symbols', 'start_paragraph_id': 5, 'start_character': 278, 'end_paragraph_id': 5, 'end_character': 284, 'bleu_score': 1.0, 'section': 'Section::::Rings.\n'}]}, {'answer': 'Asia', 'provenance': [{'wikipedia_id': '731192', 'title': 'Olympic symbols', 'start_paragraph_id': 5, 'start_character': 272, 'end_paragraph_id': 5, 'end_character': 276, 'bleu_score': 1.0, 'section': 'Section::::Rings.\n'}]}, {'answer': 'America', 'provenance': [{'wikipedia_id': '731192', 'title': 'Olympic symbols', 'start_paragraph_id': 5, 'start_character': 292, 'end_paragraph_id': 5, 'end_character': 299, 'bleu_score': 1.0, 'section': 'Section::::Rings.\n'}]}, {'answer': 'Oceania'}, {'answer': 'Europe', 'provenance': [{'wikipedia_id': '731192', 'title': 'Olympic symbols', 'start_paragraph_id': 5, 'start_character': 264, 'end_paragraph_id': 5, 'end_character': 270, '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': 0.8343087246849831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10983131983773021429}, 'section': 'Section::::Rings.\n'}]}]