Complex sentence: On January 1,2008 Slovakia joined the Schengen Agreement once again hardening the crossing between the two Szelmences, forcing again the Mali Selmencians to travel to Uzhgorod for visas to Slovakia.
Split into simpler sentences: On January 1,2008 Slovakia joined the Schengen Agreement, resulting in tightening of the crossing between the two Szelmences once again. The residents of Mali Selmentsi were again forced to travel to Uzhgorod for visas to Slovakia.