( ( archipelagic ( ( apron ( A ( gentle slope ) ) ) ( with ( ( a ( ( generally smooth ) surface ) ) ( on ( the ( sea floor ) ) ) ) ) ) ) ( , ( particularly ( ( found ( around ( groups ( of ( ( islands or ) seamounts ) ) ) ) ) . ) ) ) )
(ROOT (S (NP (NP (NN archipelagic)) (VP (VBN apron) (NP (DT A) (JJ gentle) (NN slope)) (PP (IN with) (NP (NP (DT a) (ADJP (RB generally) (JJ smooth)) (NN surface)) (PP (IN on) (NP (DT the) (NN sea) (NN floor))))))) (, ,) (ADVP (RB particularly)) (VP (VBN found) (PP (IN around) (NP (NP (NNS groups)) (PP (IN of) (NP (NNS islands) (CC or) (NNS seamounts)))))) (. .)))
archipelagic apron A gentle slope with a generally smooth surface on the sea floor, particularly found around groups of islands or seamounts.
(ROOT (S (NP (NP (NNS Seamounts)) (SBAR (WHNP (WDT that)) (S (VP (VBP rise) (PP (IN above) (NP (DT the) (NN water) (NN surface))))))) (VP (VBP are) (VP (VBN called) (NP (NNS islands)))) (. .)))