( ( This problem ) ( ( is ( common ( to ( ( all ( six ( carbon atoms ) ) ) ( in ( the ring ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN problem)) (VP (VBZ is) (ADJP (JJ common) (PP (TO to) (NP (NP (DT all) (CD six) (NN carbon) (NNS atoms)) (PP (IN in) (NP (DT the) (NN ring))))))) (. .)))
This problem is common to all six carbon atoms in the ring.
(ROOT (S (NP (DT All) (NN carbon) (NNS atoms)) (VP (VBP have) (NP (CD six) (NNS protons))) (. .)))