( ( ( x & ) & ) ( ( ( ( i ( ( A watershed ) ( is ( ( ( an area ) ( of land ) ) ( that ( is ( drained ( by ( a ( distinct ( stream ( or ( river system ) ) ) ) ) ) ) ) ) ) ) ) ) and ) ( is ( ( separated ( from ( other watersheds ) ) ) ( by ( ridgetop boundaries ) ) ) ) ) . ) )
(ROOT (S (NP (NP (SYM x)) (CC &) (NP (SYM &))) (VP (VP (VBD i) (SBAR (S (NP (DT A) (NN watershed)) (VP (VBZ is) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (NN land))) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (VP (VBN drained) (PP (IN by) (NP (DT a) (JJ distinct) (NN stream) (CC or) (NN river) (NN system)))))))))))) (CC and) (VP (VBZ is) (VP (VBN separated) (PP (IN from) (NP (JJ other) (NNS watersheds))) (PP (IN by) (NP (NN ridgetop) (NNS boundaries)))))) (. .)))
x&&i A watershed is an area of land that is drained by a distinct stream or river system and is separated from other watersheds by ridgetop boundaries.
(ROOT (S (NP (NP (DT All)) (PP (IN of) (NP (NP (DT the) (NN land)) (VP (VBN drained) (PP (IN by) (NP (DT a) (NN river) (NN system))))))) (VP (VBZ is) (VP (VBN called) (NP (NP (PRP$ its) (NN basin)) (, ,) (CC or) (NP (DT the) (`` ``) (JJ wet) ('' '') (NN term) (NN watershed)))))))