Sunbathers frolic on the beach under a bright sun.
sunbathers lathered themselves with sunscreen
Just because people are on the beach doesn't mean they are using sunscreen.
exists s1 s2 x1 x2 x3 x4.(n_beach(x3) & a_topic(x1) & on(x1,x3) & under(x3,x4) & n_sun(x4) & a_bright(s2) & Theme(s2,x4) & Theme(s1,x2) & a_frolic(s1) & (x1 = x2) & n_sunbather(x1))
exists e1 x1 x2 x3.(n_group(x2) & with(e1,x3) & n_sunscreen(x3) & Theme(e1,x2) & Actor(e1,x1) & v_lather(e1) & n_sunbather(x1))