VENICE, ITALY - JUNE 02: Installation "The Black Arch" by Saudi sisters Raja and Shadia Alem is seen at the pavillion of Saudi Arabia taking part for the first time to the Venice Biennale on June 2, 2011 in Venice, Italy. This year's Biennale is the 54th edition and will run from June 4th until 27 November. (Photo by Marco Secchi/Getty Images)
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