( Most ( ( ( barometers ( today ( measure ( air pressure ) ) ) ) ( in millibars ) ) . ) )
(ROOT (S (NP (JJS Most)) (VP (VBZ barometers) (NP (NN today) (NN measure) (NN air) (NN pressure)) (PP (IN in) (NP (NNS millibars)))) (. .)))
Most barometers today measure air pressure in millibars.
(ROOT (S (NP (NNP Millibar)) (VP (VBZ is) (NP (NP (DT the) (NN unit)) (VP (VBN used) (S (VP (TO to) (VP (VB measure) (NP (NN air) (NN pressure)))))))) (. .)))