( ( ( All ( living entities ) ) ( on ( this Earth ) ) ) ( ( ( ( directly or ) indirectly ) ( ( derive sustenance ) ( from ( ( the ( Sun 's ) ) energy ) ) ) ) . ) )
(ROOT (S (NP (NP (DT All) (VBG living) (NNS entities)) (PP (IN on) (NP (DT this) (NN Earth)))) (VP (ADVP (RB directly) (CC or) (RB indirectly)) (VBP derive) (NP (NN sustenance)) (PP (IN from) (NP (NP (DT the) (NNP Sun) (POS 's)) (NN energy)))) (. .)))
All living entities on this Earth directly or indirectly derive sustenance from the Sun's energy.
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (NP (DT the) (NN energy)) (VP (VBN used) (PP (IN by) (NP (VBG living) (NNS things))))))) (VP (VBZ comes) (ADVP (CC either) (RB directly) (CC or) (RB indirectly)) (PP (IN from) (NP (DT the) (NN sun)))) (. .)))
Most of the energy used by living things comes either directly or indirectly from the sun.