( ( three ( and six ) ) . )
(ROOT (NP (NP (CD three)) (QP (CC and) (CD six)) (. .)))
three and six.
(ROOT (S (S (VP (VBG Being) (ADJP (JJ able) (S (VP (TO to) (VP (VB read))))))) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (DT a) (JJ learned) (NN trait))))) (. .)))