I have come across this short piece. I am unsure about the key (even though it uses 2 flats as its key signature - so I am assuming it mostly is Bb major). I could not identify one of the chords (chord 2), & hence have not been able to find out the cadence.
I have guessed the chords 1 and 3. Chord 1 - Gm, Chord 3 - F. The chord coming before chord 1 is Bb. What could possibly be the cadence, & the chord 2?