Complex sentence: The Argentino was a complementary currency in Argentina announced by then-president Adolfo Rodríguez Saá on December 26,2001 during the Argentine economic crisis, but he resigned on December 30,2001 and this plan was never implemented.
Split into simpler sentences: The Argentino was a complementary currency in Argentina announced by then-president Adolfo Rodríguez Saá on December 26,2001 during the Argentine economic crisis. He resigned on December 30,2001 and this plan was never implemented.