Frankfurt sanitation workers mistakenly removed and destroyed some yellow plastic sheets on the street that were part of an art installation. “Thirty of the dustmen are now being sent to modern art classes to try to ensure that the same mistake never happens again. The head of Frankfurt’s sanitation department, Peter Postleb, took responsibility for the destruction of the sculpture, saying that confusing the plastic sheets with rubbish was an easy mistake to make. He thought they were abandoned building materials.”