The treaty requires that members comply with guidelines on deficits, public debt and other fiscal benchmarks by the end of 1997 if they are to qualify for taking part in the introduction of a new, single European currency in 1999.
a new european currency was introduced before 1999 that required participants to meet requirements by 1997
it was introduced in 1999 not before
( z1 introduce :ARG1 ( z2 currency :ARG1-of ( z3 new ) :mod ( z4 continent :name ( z5 name :op "Europe" ) ) :ARG0-of ( z6 require :ARG1 ( z7 meet :ARG0 ( z8 person :ARG0-of ( z9 participate ) ) :ARG1 ( z10 require ) :time ( z11 by :op ( z12 date-entity :year 1997 ) ) ) ) :ARG2 z8 ) )