The river-beds are mostly too shallow for anything but flat-bottomed boats.
( ( The river-beds ) ( ( ( are mostly ) ( too ( shallow ( for ( anything ( but ( flat-bottomed boats ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS river-beds)) (VP (VBP are) (ADVP (RB mostly)) (ADJP (RB too) (JJ shallow) (PP (IN for) (NP (NP (NN anything)) (PP (CC but) (NP (JJ flat-bottomed) (NNS boats))))))) (. .)))
Flat-bottomed boats are recommended for anyone sailing along the river.
( ( Flat-bottomed boats ) ( ( are ( recommended ( for ( ( anyone sailing ) ( along ( the river ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Flat-bottomed) (NNS boats)) (VP (VBP are) (VP (VBN recommended) (PP (IN for) (NP (NP (NN anyone) (NN sailing)) (PP (IN along) (NP (DT the) (NN river))))))) (. .)))