( Children ( ( were ( ( shown ( ( various sets ) ( of photographs ) ) ) ( with ( ( an ( accompanying text ) ) ( ( describing ( ( ( ( ( an ( animal 's ) ) or ) ( plant 's ) ) role ) ( in ( ( the transfer ) ( of energy ) ) ) ) ) ( within ( an ecosystem ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Children)) (VP (VBD were) (VP (VBN shown) (NP (NP (JJ various) (NNS sets)) (PP (IN of) (NP (NNS photographs)))) (PP (IN with) (NP (NP (DT an) (VBG accompanying) (NN text)) (VP (VBG describing) (NP (NP (NP (NP (DT an) (NN animal) (POS 's)) (CC or) (NP (NN plant) (POS 's))) (NN role)) (PP (IN in) (NP (NP (DT the) (NN transfer)) (PP (IN of) (NP (NN energy)))))) (PP (IN within) (NP (DT an) (NN ecosystem)))))))) (. .)))
Children were shown various sets of photographs with an accompanying text describing an animal's or plant's role in the transfer of energy within an ecosystem.
(ROOT (S (NP (NP (DT A) (NN role)) (PP (IN of) (NP (NP (NNS mushrooms)) (PP (IN in) (NP (NNS ecosystems)))))) (VP (VBZ is) (VP (VBG breaking) (PRT (RP down)) (NP (JJ dead) (NN plant) (NN material)))) (. .)))