of control on a long patch of black ice 
(ROOT (PP (PP (IN of) (NP (NN control))) (PP (IN on) (NP (NP (DT a) (JJ long) (NN patch)) (PP (IN of) (NP (JJ black) (NN ice)))))))
(ROOT (PP (PP (IN ) (NP (NN ))) (PP (IN ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (JJ ) (NN )))))))