A boy in green trunks slides down a water slide.
A boy sun tanning on the beach.
The boy sliding down the water slide implies that he must be at a water park if so that means he is not at a beach.
exists e1 s1 s2 x1 x2 x3 x4.(a_down(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x1) & v_slide(e1) & n_slide(x3) & of(x3,x4) & n_water(x4) & in(x1,x2) & n_trunk(x2) & a_green(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 x1 x2 x3 x4.(n_beach(x4) & a_topic(x1) & on(e1,x4) & Actor(e1,x3) & v_tan(e1) & (x1 = x3) & n_sun(x1) & of(x1,x2) & n_boy(x2))