A man on stage singing wearing a hat that says' wasted'.
the man on the stage is wearing a hat
This summarizes the first sentence and tells us the man is on stage and wearing a hat.
exists e1 e2 e3 x1 x2 x3 x4 x5 x6.(a_topic(x1) & Theme(e3,x6) & Actor(e3,x3) & v_wear(e3) & n_'(x6) & Theme(e2,x6) & v_waste(e2) & of(x6,x4) & Actor(e1,x5) & v_say(e1) & (x4 = x5) & n_hat(x4) & (x1 = x3) & on(x1,x2) & n_stage(x2) & n_man(x1))
exists e1 x1 x2 x3.(n_stage(x2) & n_man(x1) & Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_hat(x3) & on(x1,x2))