( Students ( ( examine ( ( ( carbon molecules ) and ) ( organic compounds ) ) ) . ) )
(ROOT (S (NP (NNS Students)) (VP (VBP examine) (NP (NP (NN carbon) (NNS molecules)) (CC and) (NP (JJ organic) (NNS compounds)))) (. .)))
Students examine carbon molecules and organic compounds.
(ROOT (S (NP (VBG Living) (NNS organisms)) (VP (VBP are) (VP (VBN comprised) (PP (IN of) (NP (NP (JJ organic) (NNS compounds)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (NP (NP (NNS molecules)) (VP (VBN built) (PP (IN around) (NP (NN carbon)))))))))))) (. .)))