Question: when did italy and germany form an alliance
[{'answer': '20 May 1882', 'provenance': [{'wikipedia_id': '165231', 'title': 'Triple Alliance (1882)', 'start_paragraph_id': 1, 'start_character': 99, 'end_paragraph_id': 1, 'end_character': 110, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '165231', 'title': 'Triple Alliance (1882)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 712, 'bleu_score': 0.9326728348352361, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12370641117707284639}, 'section': 'Section::::Abstract.'}]}]