( GROWING ( POPULATION - ) )
(ROOT (NP (NNP GROWING) (NNP POPULATION) (: -)))
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)) (. .)))