you are a semantic parser, which help parse a natural language (x) to a logical form (y). Given some following examples: 
example 1: 
x = what is the fare from ci0 to ci1 on coach one way
y = (lambda $0 e (exists $1 (and (oneway $1) (class_type $1 coach:cl) (from $1 ci0) (to $1 ci1) (= (fare $1 ) $0 ) ) ) )

example 2: 
x = what al0 leav ci0 befor ti0
y = (lambda $0 e (and (flight $0) (airline $0 al0) ( < (departure_time $0) ti0) (from $0 ci0) ) ) 

example 3:
x = a one way flight from ci1 to ci0 pleas
y = ( lambda $0 e ( and ( flight $0 ) ( oneway $0 ) ( from $0 ci1 ) ( to $0 ci0 ) ) ) 

what is the logical form (y) of given input sentence (x) = "the one way flight from ci0 to ci1 before ti0"?  Only generate logic y without any explanation.  Add stress words which are capitalized. Limit those stress words for less than 4 times.
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