Woman giving a presentation about a Chevrolet car.
A woman is talking about the benefits of a Chevrolet car.
The first sentence is a presentation and the second is specifically about benefits.
exists e1 x1 x2 x3 x4.(ne_nam_woman(x1) & Theme(e1,x2) & Actor(e1,x1) & v_give(e1) & about(x2,x3) & n_car(x3) & of(x3,x4) & n_chevrolet(x4) & n_presentation(x2))
exists e1 x1 x2 x3 x4.(n_benefit(x2) & about(e1,x2) & of(x2,x3) & n_car(x3) & of(x3,x4) & n_chevrolet(x4) & Actor(e1,x1) & v_talk(e1) & n_woman(x1))