4) Not enough is known about how nontransportation costs vary with distance.
( ( 4 -RRB- ) ( ( Not enough ) ( ( is ( known ( about ( how ( ( nontransportation costs ) ( vary ( with distance ) ) ) ) ) ) ) . ) ) )
(ROOT (S (LST (LS 4) (-RRB- -RRB-)) (NP (RB Not) (JJ enough)) (VP (VBZ is) (VP (VBN known) (PP (IN about) (SBAR (WHADVP (WRB how)) (S (NP (NN nontransportation) (NNS costs)) (VP (VBP vary) (PP (IN with) (NP (NN distance))))))))) (. .)))
There's more than enough known concerning the ways in which costs associated with nontransportation change according to the distance.
( There ( ( ( 's ( more ( than enough ) ) ) ( known ( concerning ( ( the ways ) ( ( in which ) ( costs ( ( associated ( with ( nontransportation change ) ) ) ( according ( to ( the distance ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ 's) (ADVP (RBR more) (IN than) (RB enough)) (VP (VBN known) (PP (VBG concerning) (NP (NP (DT the) (NNS ways)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (NNS costs)) (VP (VBN associated) (PP (IN with) (NP (NN nontransportation) (NN change))) (PP (VBG according) (PP (TO to) (NP (DT the) (NN distance))))))))))) (. .)))