( ( The advantages ) ( of ( a ( dominant sporophyte ) ) ) )
(ROOT (NP (NP (DT The) (NNS advantages)) (PP (IN of) (NP (DT a) (JJ dominant) (NN sporophyte)))))
The advantages of a dominant      sporophyte
(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))))))) (. .)))