Last year was a difficult one for Barcelona: The ongoing economic recession in combination with increasing political crisis has turned the once dazzling Catalan capital into a disheartening wasteland. One of the very few glittering lights was the emergence of Black Tulip, the enigmatic umbrella under which a number of artists explore, among other things, issues of authorship in creative processes. The group has no fixed membership; each project has different participants. Early in March of last year, for instance, Black Tulip performed an inspiring action at Halfhouse, an artist’s association