( ( Biomass energy ) ( ( is ( an ( indigenous resource ) ) ) . ) )
(ROOT (S (NP (JJ Biomass) (NN energy)) (VP (VBZ is) (NP (DT an) (JJ indigenous) (NN resource))) (. .)))
Biomass energy is an indigenous resource.
(ROOT (S (NP (NNS Biomass)) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (DT a) (JJ renewable) (NN energy) (NN resource))))) (. .)))
Biomass is an example of a renewable energy resource.