( ( Plants ( as ( food ( for ( a ( growing population ) ) ) ) ) ) ; )
(ROOT (NP (NP (NP (NNS Plants)) (PP (IN as) (NP (NP (NN food)) (PP (IN for) (NP (DT a) (VBG growing) (NN population)))))) (: ;)))
Plants as food for a growing population;
(ROOT (S (SBAR (IN As) (S (NP (DT the) (NN population)) (VP (VBZ grows)))) (, ,) (NP (NP (NN competition)) (PP (IN for) (NP (NN food)))) (VP (VBZ grows)) (. .)))