( ( ( The ( dominant stage ) ) ( of ( ( the lifecycle ) ( of ( a fern ) ) ) ) ) ( ( is ( ( ( the sporophyte ) , ) ( which ( consists ( of ( ( large ( compound leaves ) ) ( called fronds ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ dominant) (NN stage)) (PP (IN of) (NP (NP (DT the) (NN lifecycle)) (PP (IN of) (NP (DT a) (NN fern)))))) (VP (VBZ is) (NP (NP (DT the) (NN sporophyte)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ consists) (PP (IN of) (NP (NP (JJ large) (NN compound) (NNS leaves)) (VP (VBN called) (NP (NNS fronds)))))))))) (. .)))
The dominant stage of the lifecycle of a fern is the sporophyte, which consists of large compound leaves called fronds.
(ROOT (S (NP (DT The) (JJ sporophyte) (NN stage)) (VP (VBZ is) (NP (NP (DT the) (JJ dominant) (NN stage)) (PP (IN of) (NP (NP (DT the) (NN lifecycle)) (PP (IN of) (NP (DT a) (NN fern))))))) (. .)))