( ( Unit ( ( analysis and ) ( dimensional groups ) ) ) . )
(ROOT (NP (NP (NNP Unit)) (NP (NP (NN analysis)) (CC and) (NP (JJ dimensional) (NNS groups))) (. .)))
Unit analysis and dimensional groups.
(ROOT (S (NP (JJ Dimensional) (NN analysis)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB carry) (PRT (RP out)) (NP (JJ metric) (NN unit) (NNS conversions))))))) (. .)))