article_content: 
  a new exhibition explores the history of modern urban graffiti - from its roots in the inner cities of philadelphia and new york  through to the present day global graffiti movement. masters of invention - at the lettering arts centre in suffolk - looks at the emergence of simple personal tags in the late 1960s  to highly intricate contemporary forms of this urban art. it is curated by errol donald - a former graffiti artist whose work below was displayed in the uk's first exhibition dedicated to graffiti  in bristol  more than 30 years ago.
article_headline: the writing on the wall