a tired , unimaginative and derivative variation of that already-shallow 
(ROOT (NP (NP (DT a) (ADJP (JJ tired) (, ,) (JJ unimaginative) (CC and) (JJ derivative)) (NN variation)) (PP (IN of) (NP (DT that) (ADJP (RB already) (HYPH -) (JJ shallow))))))
(ROOT (NP (NP (DT ) (ADJP (JJ ) (, ) (JJ ) (CC ) (JJ )) (NN )) (PP (IN ) (NP (DT ) (ADJP (RB ) (HYPH ) (JJ ))))))