( ( ( ( ( ( ( Our ( baseline knowledge ) ) ( of ( plant distributions ) ) ) ( is ( skeletal ( at best ) ) ) ) , ) yet ) ( ( ( ( plants ( are ( ( the ( primary producers ) ) ( in ecosystems ) ) ) ) , ) and ) ( ( all organisms ) ( ultimately ( depend ( on them ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (PRP$ Our) (JJ baseline) (NN knowledge)) (PP (IN of) (NP (NN plant) (NNS distributions)))) (VP (VBZ is) (ADJP (JJ skeletal) (PP (IN at) (ADJP (JJS best)))))) (, ,) (CC yet) (S (S (NP (NNS plants)) (VP (VBP are) (NP (NP (DT the) (JJ primary) (NNS producers)) (PP (IN in) (NP (NNS ecosystems)))))) (, ,) (CC and) (S (NP (DT all) (NNS organisms)) (ADVP (RB ultimately)) (VP (VBP depend) (PP (IN on) (NP (PRP them)))))) (. .)))
Our baseline knowledge of plant distributions is skeletal at best, yet plants are the primary producers in ecosystems, and all organisms ultimately depend on them.
(ROOT (S (NP (DT All) (VBG living) (NNS organisms)) (VP (VBP are) (ADJP (JJ dependent) (PP (IN on) (NP (NNS plants)))) (SBAR (IN because) (S (NP (NNS plants)) (VP (VBP are) (NP (NNS producers)))))) (. .)))