( ( ( The ( valence electrons ) ) ( in ( ( the atom ) ( which ( have ( low ( ionization potentials ) ) ) ) ) ) ) ( ( are ( considered ( to ( ( ( be ( ( a ( free ( moving ( `` ( sea '' ) ) ) ) ) ( within ( the lattice ) ) ) ) , ) ( ( giving metals ) ( the ( ability ( to ( conduct ( ( heat and ) electricity ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ valence) (NNS electrons)) (PP (IN in) (NP (NP (DT the) (NN atom)) (SBAR (WHNP (WDT which)) (S (VP (VBP have) (NP (JJ low) (NN ionization) (NNS potentials)))))))) (VP (VBP are) (VP (VBN considered) (S (VP (TO to) (VP (VB be) (NP (NP (DT a) (JJ free) (NN moving) (`` ``) (NN sea) ('' '')) (PP (IN within) (NP (DT the) (NN lattice)))) (, ,) (S (VP (VBG giving) (NP (NNS metals)) (NP (DT the) (NN ability) (S (VP (TO to) (VP (VB conduct) (NP (NN heat) (CC and) (NN electricity))))))))))))) (. .)))
The valence electrons in the atom which have low ionization potentials are considered to be a free moving &quot;sea&quot; within the lattice, giving metals the ability to conduct heat and electricity.
(ROOT (S (NP (NNP Metal)) (VP (VBZ conducts) (NP (NP (NN heat) (CC and) (NN electricity)) (ADVP (RB so)) (PP (RB well) (RB because) (IN of) (NP (JJ free) (VBG flowing) (NNS electrons))))) (. .)))