FILE - German Chancellor Angela Merkel, left, and Italian Prime Minister Matteo Renzi speak during a press conference in front of Michelangelo's "David statue" after their bilateral summit in Florence, Italy, Jan. 23, 2015. A Florida charter school principal has been forced to resign after a parent complained sixth graders were exposed to pornography during a lesson on Renaissance art that included Michelangelo's 'David' sculpture. (AP Photo/Antonio Calanni, File) FILE PHOTO

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