You cannot touch, see, or hear the most important benefit of your Audubon membership.
( You ( ( ( can not ) ( ( ( ( ( ( touch , ) see ) , ) or ) hear ) ( ( the ( ( most important ) benefit ) ) ( of ( your ( Audubon membership ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (MD can) (RB not) (VP (VB touch) (, ,) (VB see) (, ,) (CC or) (VB hear) (NP (NP (DT the) (ADJP (RBS most) (JJ important)) (NN benefit)) (PP (IN of) (NP (PRP$ your) (NNP Audubon) (NN membership)))))) (. .)))
It is intangible but highly valuable.
( It ( ( is ( intangible ( but ( highly valuable ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (ADJP (JJ intangible) (CC but) (RB highly) (JJ valuable))) (. .)))