by an imaginatively mixed cast of antic spirits 
(ROOT (PP (IN by) (NP (NP (DT an) (ADJP (RB imaginatively) (VBN mixed)) (NN cast)) (PP (IN of) (NP (JJ antic) (NNS spirits))))))
(ROOT (PP (IN ) (NP (NP (DT ) (ADJP (RB ) (VBN )) (NN )) (PP (IN ) (NP (JJ ) (NNS ))))))