( ( ( The ( current model ) ) ( of ( ( the evolution ) ( of ( the ( first ( living organisms ) ) ) ) ) ) ) ( ( is ( that ( these ( were ( ( some form ) ( of ( ( prokaryotes , ) ( which ( may ( have ( ( evolved out ) ( of protocells ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ current) (NN model)) (PP (IN of) (NP (NP (DT the) (NN evolution)) (PP (IN of) (NP (DT the) (JJ first) (NN living) (NNS organisms)))))) (VP (VBZ is) (SBAR (IN that) (S (NP (DT these)) (VP (VBD were) (NP (NP (DT some) (NN form)) (PP (IN of) (NP (NP (NNS prokaryotes)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (MD may) (VP (VB have) (VP (VBN evolved) (PRT (RP out)) (PP (IN of) (NP (NNS protocells))))))))))))))) (. .)))
The current model of the evolution of the first living organisms is that these were some form of prokaryotes, which may have evolved out of protocells.
(ROOT (S (NP (NNS Prokaryotes)) (VP (VBD were) (NP (NP (DT the) (JJ first) (NN living) (NNS things)) (SBAR (S (VP (TO to) (VP (VB evolve) (PP (IN on) (NP (NN earth))))))))) (. .)))