A couple with sunglasses are laying on the beach.
A couple are getting a tan from the sun's rays.
Just because a couple is laying on the beach in sunglasses does not mean they are getting a tan.
exists e1 x1 x2 x3.(n_beach(x3) & on(e1,x3) & Actor(e1,x1) & v_lay(e1) & with(x1,x2) & n_sunglass(x2) & n_couple(x1))
exists e1 x1 x2 x3 x4.(n_ray(x4) & of(x4,x3) & n_sun(x3) & from(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_get(e1) & n_tan(x2) & n_couple(x1))