( ( ( ( ( ( At ( absolute zero ) ) ( , ( ( all motion ) ceases ) ) ) , ) but ) ( nothing ( ceases ( to exist ) ) ) ) . )
(ROOT (S (S (PP (IN At) (NP (JJ absolute) (CD zero))) (, ,) (NP (DT all) (NN motion)) (VP (VBZ ceases))) (, ,) (CC but) (S (NP (NN nothing)) (VP (VBZ ceases) (S (VP (TO to) (VP (VB exist)))))) (. .)))
At absolute zero, all motion ceases, but nothing ceases to exist.
(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)))) (. .)))