gefunden, das

found … that

→ finden
phrase Rare #42,285
found … that “Das” begins a relative clause referring to a neuter noun mentioned before it.
GE: Ich habe das Handy gefunden, das du verloren hast.
EN: I found the phone that you lost.

Wer hat das Buch gefunden, das ich verloren hatte?

Who found the book I lost?

Ich habe das Geld gefunden, das Tom verloren hat.

I found the money Tom lost.

Er hat das Buch gefunden, das er seit langem suchte.

He found the book he had been looking for for a long time.

Ich habe das Foto gefunden, das du gesucht hast.

I found the photo you were looking for.