The World We Knew by Frank Sinatra is in D at 93 beats per minute and runs 1:57 across 47 bars. It uses 20 chords — Bm, F#m7, Em7, Em6, Bm9, B, Em11, F#, and a few more. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? The World We Knew guitar melody tab.