Aidez moi svp TEXTE : For a long time people have covered concrete walls and anonymous buildings with paintings and slogans which often are referred to negatively as graffiti. Some people see this more positively as a way to brighten up our ever increasing urban jungle. In 1980 a young artist by the name of Keith Haring began to use the New York subway as a platform for his highly original and colourful art work. He would later earn international recognition both for his style and his campaigns for social causes and, in particular, Aids awareness. Another street artist who began by decorating skateboards was Shepherd Fairey. His reputation would be assured when he completed a series of posters for the Barack Obama election campaign in 2008. a) what are the name of the two street artists ? b) when and where did keith haring start art ? c) did he want to help other people with his art ?