( ( Where ( ( the river ) ( empties ( into ( the ( Black Sea ) ) ) ) ) ) ( ( the 580,000 ) ( ( ha ( ( ( Danube Delta ) ( -LRB- ( ( ( 113,000 ha ) ( permanently ( covered ( by water ) ) ) ) -RRB- ) ) ) ( has ( been formed ) ) ) ) . ) ) )
(ROOT (S (SBAR (WHADVP (WRB Where)) (S (NP (DT the) (NN river)) (VP (VBZ empties) (PP (IN into) (NP (DT the) (NNP Black) (NNP Sea)))))) (NP (DT the) (CD 580,000)) (VP (VBP ha) (SBAR (S (NP (NP (NNP Danube) (NNP Delta)) (PRN (-LRB- -LRB-) (NP (NP (CD 113,000) (NN ha)) (VP (ADVP (RB permanently)) (VBN covered) (PP (IN by) (NP (NN water))))) (-RRB- -RRB-))) (VP (VBZ has) (VP (VBN been) (VP (VBN formed))))))) (. .)))
Where the river empties into the Black Sea the 580,000 ha Danube Delta (113,000 ha permanently covered by water) has been formed.
(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)))))))))))))) (. .)))