( Phytoplankton ( ( ( produce ( their ( own food ) ) ) ( by ( lassoing ( ( the energy ) ( of ( ( the sun ) ( in ( ( a process ) ( called photosynthesis ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Phytoplankton)) (VP (VBP produce) (NP (PRP$ their) (JJ own) (NN food)) (PP (IN by) (S (VP (VBG lassoing) (NP (NP (DT the) (NN energy)) (PP (IN of) (NP (NP (DT the) (NN sun)) (PP (IN in) (NP (NP (DT a) (NN process)) (VP (VBN called) (NP (NN photosynthesis)))))))))))) (. .)))
Phytoplankton produce their own food by lassoing the energy of the sun in a process called photosynthesis.
(ROOT (S (NP (NNP Phytoplankton)) (VP (VBP make) (NP (NP (NN food)) (PP (IN via) (NP (NN photosynthesis))))) (. .)))