( ( No one ) ( ever ( ( ( mentioned ( ( the ( geologic principles ) ) ( of ( ( a ( classic ( meandering river ) ) ) ( ( ( like ( the Songo ) ) and ) ( how ( deltas ( form ( at ( ( the mouths ) ( of ( slow ( moving rivers ) ) ) ) ) ) ) ) ) ) ) ) ) ( as ( they ( enter ( ( a ( large body ) ) ( of water ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (DT No) (NN one)) (ADVP (RB ever)) (VP (VBD mentioned) (NP (NP (DT the) (JJ geologic) (NNS principles)) (PP (IN of) (NP (NP (DT a) (JJ classic) (VBG meandering) (NN river)) (UCP (PP (IN like) (NP (DT the) (NNP Songo))) (CC and) (SBAR (WHADVP (WRB how)) (S (NP (NNS deltas)) (VP (VBP form) (PP (IN at) (NP (NP (DT the) (NNS mouths)) (PP (IN of) (NP (JJ slow) (VBG moving) (NNS rivers)))))))))))) (SBAR (IN as) (S (NP (PRP they)) (VP (VBP enter) (NP (NP (DT a) (JJ large) (NN body)) (PP (IN of) (NP (NN water)))))))) (. .)))
No one ever mentioned the geologic principles of a classic meandering river like the Songo and how deltas form at the mouths of slow moving rivers as they enter a large body of water.
(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)))))))))))))) (. .)))