Bb 5/G
The Bb 5 chord consists of the Bb (Perfect unison) and F (Perfect fifth) notes, with G as the bass note.

How to play the Bb 5/G chord
- Play G as the lowest bass note in the left hand
- Find Bb (Root) on the piano keyboard
- Add F (Perfect fifth) — 7 semitones above Bb
- Press all 3 notes simultaneously to sound the Bb 5/G chord