( ( ( ( ( ( ( Draw atoms ) ( with ( their valence ) ) ) ( ( electrons ( only as ) ) dots ) ) , ) ( grouped ( in ( four ( possible pairs ) ) ) ) ) ( around ( the atom ) ) ) . )
(ROOT (NP (NP (ADJP (JJ Draw)) (NNS atoms)) (PP (IN with) (NP (PRP$ their) (NN valence))) (ADJP (JJ electrons) (CONJP (RB only) (IN as)) (JJ dots)) (, ,) (VP (VBN grouped) (PP (IN in) (NP (CD four) (JJ possible) (NNS pairs)))) (PP (IN around) (NP (DT the) (NN atom))) (. .)))
Draw atoms with their valence electrons only as dots, grouped in four possible pairs around the atom.
(ROOT (S (NP (CD Four) (JJ valence) (NNS electrons)) (VP (MD can) (VP (VB be) (VP (VBN found) (PP (IN in) (NP (DT a) (NN carbon) (NN atom)))))) (. .)))