( absolute ( ( zero ( ( The ( theoretical temperature ) ) ( ( at which ) ( ( ( ( molecular motion ) vanishes ) and ) ( ( a body ) ( would ( have ( no ( heat energy ) ) ) ) ) ) ) ) ) ; ) )
(ROOT (S (NP (JJ absolute)) (VP (VBP zero) (NP (NP (DT The) (JJ theoretical) (NN temperature)) (SBAR (WHPP (IN at) (WHNP (WDT which))) (S (S (NP (JJ molecular) (NN motion)) (VP (VBZ vanishes))) (CC and) (S (NP (DT a) (NN body)) (VP (MD would) (VP (VB have) (NP (DT no) (NN heat) (NN energy))))))))) (: ;)))
absolute zero The theoretical temperature at which molecular motion vanishes and a body would have no heat energy;
(ROOT (S (NP (NP (DT The) (NN temperature)) (SBAR (WHPP (IN at) (WHNP (WDT which))) (S (NP (DT all) (JJ molecular) (NN motion)) (VP (VBZ has) (VP (VBN ceased)))))) (VP (VBZ is) (VP (VBN called) (NP (JJ absolute) (NN zero)))) (. .)))