( ( MILLIBAR ( ( A unit ) ( of ( atmospheric pressure ) ) ) ) . )
(ROOT (NP (NP (NNP MILLIBAR)) (NP (NP (DT A) (NN unit)) (PP (IN of) (NP (JJ atmospheric) (NN pressure)))) (. .)))
MILLIBAR A unit of atmospheric pressure.
(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)))))))) (. .)))