FR 9601 then KL 1506 at Madrid
Rome → Madrid → Amsterdam
Timetable, Madrid time
19:50FR 9601 from Rome at the gate
17:00KL 1506 to Amsterdam leaves the gate
21 h 10 apart on the timetable, overnight
KL 1506 leaves 21 h 10 after FR 9601 arrives on the timetable: more than half a day, so not a connection we count.