( ( Absolute zero ) ( ( is ( where ( ( all ( atomic ( and ( molecular motion ) ) ) ) ( ( stops and ) ( is ( ( the ( lowest temperature ) ) possible ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Absolute) (CD zero)) (VP (VBZ is) (SBAR (WHADVP (WRB where)) (S (NP (DT all) (JJ atomic) (CC and) (JJ molecular) (NN motion)) (VP (VP (VBZ stops)) (CC and) (VP (VBZ is) (NP (NP (DT the) (JJS lowest) (NN temperature)) (ADJP (JJ possible)))))))) (. .)))
Absolute zero is where all atomic and molecular motion stops and is the lowest temperature possible.
(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)))) (. .)))