Question: what was the biggest tank in world war 2
[{'answer': 'Panzerkampfwagen VIII Maus', 'provenance': [{'wikipedia_id': '349115', 'title': 'Panzer VIII Maus', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': "Panzerkampfwagen VIII Maus ( `` Mouse '' )"}, {'provenance': [{'wikipedia_id': '349115', 'title': 'Panzer VIII Maus', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7240132872644366596}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '349115', 'title': 'Panzer VIII Maus', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 320, 'bleu_score': 0.8490840707623131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7240132872644366596}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '349115', 'title': 'Panzer VIII Maus', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Panzerkampfwagen VIII Maus ("Mouse") was a German World War II super-heavy tank completed in late 1944. It is the heaviest fully enclosed armoured fighting vehicle ever built. Five were ordered, but only two hulls and one turret were completed before the testing grounds were captured by advancing Soviet military forces.\rhighlight sentence(s) containing evidence, not only the answer', 'Panzerkampfwagen VIII Maus ("Mouse") was a German World War II super-heavy tank completed in late 1944. It is the heaviest fully enclosed armoured fighting vehicle ever built', 'Panzerkampfwagen VIII Maus ("Mouse") was a German World War II super-heavy tank completed in late 1944. It is the heaviest fully enclosed armoured fighting vehicle ever built. Five were ordered, but only two hulls and one turret were completed before the testing grounds were captured by advancing Soviet military forces.']}}]}]