KL 1654 then U2 7925 at Schiphol
Firenze → Amsterdam → Prague
Timetable, Amsterdam time
15:15KL 1654 from Firenze at the gate
07:00U2 7925 to Prague leaves the gate
15 h 45 apart on the timetable, overnight
U2 7925 leaves 15 h 45 after KL 1654 arrives on the timetable: more than half a day, so not a connection we count.