showcases a group of dedicated artists 
(ROOT (S (VP (VBZ showcases) (NP (NP (DT a) (NN group)) (PP (IN of) (NP (VBN dedicated) (NNS artists)))))))
(ROOT (S (VP (VBZ ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (VBN ) (NNS )))))))