Graffiti artists paint on a 217-meter-long board near an art gallery in Mexico City, Aug. 2, 2009.[Xinhua]
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![Graffiti artists paint on a 217-meter-long board near an art gallery in Mexico City, Aug. 2, 2009.[Xinhua]](http://images.china.cn/attachement/jpg/site1007/20090804/000bcdb95f1d0be1dd531e.jpg "Graffiti artists paint on a 217-meter-long board near an art gallery in Mexico City, Aug. 2, 2009.[Xinhua]")