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                <div class="attribution"><a href="https://upload.wikimedia.org/wikipedia/commons/e/e3/CalabiYau5.jpg">CalabiYau5</a> (right) by <a href="https://legacy.cs.indiana.edu/~hansona/papers/CP2-94.pdf">Andrew J. Hanson</a> is licensed under <a href="https://creativecommons.org/licenses/by-sa/3.0/deed.en">CC BY-SA 3.0</a>.</div>
         