National currencies will be completely replaced by the euro in within six months after the introduction of euro notes and coins.
Seven months after euro has been introduced, national currencies will be no more.
It was said in the statement that national currencies will be COMPLETELY replaced and I tricked the system by using 7 months instead of 6 months, which by the way, is long enough to completely replace national currencies after euro notes and coins have been introduced.
( z1 currency :mod ( z2 nation ) :mod ( z3 more :polarity - ) :time ( z4 after :op ( z5 introduce :ARG1 ( z6 euro ) ) :quant ( z7 temporal-quantity :quant 7 :unit ( z8 month ) ) ) )