A man is driving some sort of vehicle wearing a bright orange vest.
A man is driving.
The man who is driving has to be driving some sort of vehicle.
exists e1 e2 s1 x1 x2 x3 x4 x5.(for(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_wear(e2) & n_vest(x4) & of(x4,x5) & n_orange(x5) & a_bright(s1) & Theme(s1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & of(x2,x3) & n_vehicle(x3) & n_sort(x2) & n_man(x1))
exists e1 x1.(Actor(e1,x1) & v_drive(e1) & n_man(x1))