a nasty aftertaste but little clear memory 
(ROOT (NP (NP (DT a) (JJ nasty) (NN aftertaste)) (CC but) (NP (JJ little) (JJ clear) (NN memory))))
(ROOT (NP (NP (DT ) (JJ ) (NN )) (CC ) (NP (JJ ) (JJ ) (NN ))))