Question: what was the original purpose of the kremlin
[{'answer': "the tsar 's Moscow residence", 'provenance': [{'wikipedia_id': '381075', 'title': 'Moscow Kremlin', 'start_paragraph_id': 1, 'start_character': 458, 'end_paragraph_id': 1, 'end_character': 485, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '381075', 'title': 'Moscow Kremlin', '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': 9531199358533365571}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '381075', 'title': 'Moscow Kremlin', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 585, 'bleu_score': 0.76774889133534, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9531199358533365571}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '381075', 'title': 'Moscow Kremlin', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ["The Moscow Kremlin (), or simply the Kremlin, is a fortified complex in the center of Moscow, overlooking the Moskva River to the south, Saint Basil's Cathedral and Red Square to the east, and the Alexander Garden to the west. It is the best known of the kremlins (Russian citadels) and includes five palaces, four cathedrals, and the enclosing Kremlin Wall with Kremlin towers. In addition, within this complex is the Grand Kremlin Palace that was formerly the Tsar's Moscow residence.", "emlin Wall with Kremlin towers. In addition, within this complex is the Grand Kremlin Palace that was formerly the Tsar's Moscow residence. The complex now serves as the official residence of the President of the Russian Federation and as a museum with 2,746,405 visitors in 2017.", "In addition, within this complex is the Grand Kremlin Palace that was formerly the Tsar's Moscow residence. The complex now serves as the official residence of the President of the Russian Federation and as a museum with 2,746,405 visitors in 2017."]}}]}]