( ( ( ( ( Volunteers ( play ( ( a ( crucial role ) ) ( in ( ( the restoration ) ( of ( savanna ecosystems ) ) ) ) ) ) ) , ) but ) ( little ( is ( known ( about ( ( the motivations ) ( of ( these volunteers ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Volunteers)) (VP (VBP play) (NP (NP (DT a) (JJ crucial) (NN role)) (PP (IN in) (NP (NP (DT the) (NN restoration)) (PP (IN of) (NP (NN savanna) (NNS ecosystems)))))))) (, ,) (CC but) (S (NP (RB little)) (VP (VBZ is) (VP (VBN known) (PP (IN about) (NP (NP (DT the) (NNS motivations)) (PP (IN of) (NP (DT these) (NNS volunteers)))))))) (. .)))
Volunteers play a crucial role in the restoration of savanna ecosystems, but little is known about the motivations of these volunteers.
(ROOT (S (NP (NNP Beneficial) (NNS fungi)) (VP (VBP play) (NP (NP (DT a) (JJ crucial) (NN role)) (PP (IN in) (NP (NP (NN balance)) (PP (IN of) (NP (NNS ecosystems))))))) (. .)))
Beneficial fungi play a crucial role in balance of ecosystems.