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Find a Wikipedia image that answers this question: On the main building of the Academy of Fine Arts in Vienna, the building material on the exterior changes how many times?

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Represent the given Wikipedia image with related text information: Academy of Fine Arts - Vienna Fragment of the main building of the Academy of Fine Arts in Vienna, Austria.

['<|image_1|>\nRepresent the given Wikipedia image with related text information: Koenigsplatz Antikensammlung Muenchen-2.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Building Forum with ZUŠ and dance halls in Třebíč, Třebíč District Building Forum with ZUS and dance halls in Trebic.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Pałac Kultury i Nauki - 01 Palace of Culture and Science, Warsaw, Poland.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: The magnificent neoclassical façade of the Kurhaus (spa house), Wiesbaden, Neoclassical architecture (9069107034).\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Athens academy Academy of Athens.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Neoclassical facade of the Museum of Wiesbaden, Neoclassical architecture (9069007958).\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: The National Museum of Fine Arts, Stockholm, Sweden The National Museum of Fine Arts (Nationalmuseum), on the peninsula Blasieholmen in central Stockholm, Sweden.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: 043 Bahnhofstrasse 19.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Kunsthistorisches Museum Vienna, Austria (22679099901).\n', "<|image_1|>\nRepresent the given Wikipedia image with related text information: Szily Kálmán Szakgimnázium és 'Timót utca' villamos megálló, 2018 Ferencváros : Budapest Mechanical Vocational Training Center (BGSZC) Szily Kalman Technical Vocational High School, Secondary School and Dormitory. - Gubacsi ut, 9th district, Budapest.\n", '<|image_1|>\nRepresent the given Wikipedia image with related text information: Bahnhofstrasse, Zürich - panoramio (32).\n']
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