Question: who fought in the battle of menin road
[{'answer': 'Australia', 'provenance': [{'wikipedia_id': '34454833', 'title': 'Battle of the Menin Road Ridge', 'start_paragraph_id': 28, 'start_character': 772, 'end_paragraph_id': 28, 'end_character': 781, 'bleu_score': 1.0, 'section': 'Section::::Battle.:Second Army.\n'}]}, {'answer': 'Newfoundland'}, {'answer': 'South Africa', 'provenance': [{'wikipedia_id': '34454833', 'title': 'Battle of the Menin Road Ridge', 'start_paragraph_id': 38, 'start_character': 627, 'end_paragraph_id': 38, 'end_character': 639, 'bleu_score': 1.0, 'section': 'Section::::Battle.:Fifth Army.\n'}]}, {'answer': 'United Kingdom'}, {'answer': 'Bavaria', 'provenance': [{'wikipedia_id': '34454833', 'title': 'Battle of the Menin Road Ridge', 'start_paragraph_id': 29, 'start_character': 132, 'end_paragraph_id': 29, 'end_character': 139, 'bleu_score': 1.0, 'section': 'Section::::Battle.:Second Army.\n'}]}, {'answer': 'Prussia'}, {'answer': 'Saxony'}]