( ( These ( other factors ) ) ( ( would ( be ( ( such things ) ( as ( ( how much ) ( ( oxygen ( and ( carbon dioxide ) ) ) ( are ( ( ( in ( ( ( the atmosphere ) , ) ( ( the position ) ( of ( ( ( ( the continents ) , ) ( ( the amount ) ( of ( volcanic action ) ) ) ) , ) ) ) ) ) and ) ( so on ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (JJ other) (NNS factors)) (VP (MD would) (VP (VB be) (NP (NP (JJ such) (NNS things)) (PP (IN as) (SBAR (WHADJP (WRB how) (JJ much)) (S (NP (NN oxygen) (CC and) (NN carbon) (NN dioxide)) (VP (VBP are) (UCP (PP (IN in) (NP (NP (DT the) (NN atmosphere)) (, ,) (NP (NP (DT the) (NN position)) (PP (IN of) (NP (NP (DT the) (NN continents)) (, ,) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (JJ volcanic) (NN action)))) (, ,)))))) (CC and) (ADVP (RB so) (RB on)))))))))) (. .)))
These other factors would be such things as how much oxygen and carbon dioxide are in the atmosphere, the position of the continents, the amount of volcanic action, and so on.
(ROOT (S (PP (IN During) (NP (DT the) (JJ early) (NN paleozoic))) (, ,) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN carbon) (NN dioxide)) (PP (IN in) (NP (DT the) (NN atmosphere)))))) (VP (VBD was) (ADJP (RB much) (JJR greater)) (PP (VBN compared) (PP (TO to) (NP (NN today))))) (. .)))