( ( HOW ( PLANTS GROW ) ) ( : ( ( ( WHAT ( DO ( LIVING THINGS ) ) ) ( NEED ( TO SURVIVE ) ) ) ? ) ) )
(ROOT (FRAG (NP (NNP HOW) (NNP PLANTS) (NNP GROW)) (: :) (S (NP (NNP WHAT) (NNP DO) (NNP LIVING) (NNP THINGS)) (VP (VBD NEED) (S (VP (TO TO) (VP (VB SURVIVE)))))) (. ?)))
HOW PLANTS GROW: WHAT DO LIVING THINGS NEED TO SURVIVE?
(ROOT (S (NP (DT A) (NN moose)) (VP (VBZ eats) (SBAR (S (NP (DT a) (NN plant)) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (NP (DT a) (VBG living) (NN thing)) (SBAR (WHNP (WDT that)) (S (VP (VBZ depends) (PP (IN on) (NP (DT another) (VBG living) (NN thing) (S (VP (TO to) (VP (VB survive)))))))))))))))) (. .)))