( Meter ( ( ( is ( to music ) ) ( as ( distance ( is ( to travel ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Meter)) (VP (VBZ is) (PP (TO to) (NP (NN music))) (SBAR (IN as) (S (NP (NN distance)) (VP (VBZ is) (S (VP (TO to) (VP (VB travel)))))))) (. .)))
Meter is to music as distance is to travel.
(ROOT (S (NP (JJ Meter) (JJ much) (NN distance)) (VP (MD can) (VP (VB beta) (NP (JJ particles) (NN travel)) (PP (IN through) (NP (NN air))))) (. .)))