( ( The tour ) ( ( features ( ( an ( empty ( water-tanker truck ) ) ) ( ( symbolizing ( ( the lack ) ( of water ) ) ) ( in ( ( ( the delta ) , ) ( ( ( a ( once-fecund ecosystem ) ) ( at ( ( the mouth ) ( of ( the ( Colorado River ) ) ) ) ) ) ( whose ( wetlands ( supported ( ( a ( great variety ) ) ( of wildlife ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN tour)) (VP (VBZ features) (NP (NP (DT an) (JJ empty) (JJ water-tanker) (NN truck)) (VP (VBG symbolizing) (NP (NP (DT the) (NN lack)) (PP (IN of) (NP (NN water)))) (PP (IN in) (NP (NP (DT the) (NN delta)) (, ,) (NP (NP (DT a) (JJ once-fecund) (NN ecosystem)) (PP (IN at) (NP (NP (DT the) (NN mouth)) (PP (IN of) (NP (DT the) (NNP Colorado) (NNP River))))) (SBAR (WP$ whose) (S (NP (NNS wetlands)) (VP (VBD supported) (NP (NP (DT a) (JJ great) (NN variety)) (PP (IN of) (NP (NN wildlife))))))))))))) (. .)))
The tour features an empty water-tanker truck symbolizing the lack of water in the delta, a once-fecund ecosystem at the mouth of the Colorado River whose wetlands supported a great variety of wildlife.
(ROOT (S (NP (NNP Delta)) (VP (VBZ is) (NP (NP (DT a) (NN triangular) (NN feature)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (VP (VBN formed) (SBAR (WHADVP (WRB when)) (S (NP (DT a) (NN river)) (VP (VBZ empties) (PP (IN into) (NP (NP (DT a) (JJ large) (NN body)) (PP (IN of) (NP (RB still) (NN water)))))))))))))) (. .)))