A boy smiles and swims in blue water.
The boy is sitting in the sand.
One is either swimming or sitting. One is either in sand or water.
exists e1 e2 s1 x1 x2 x3.(in(e2,x3) & n_water(x3) & a_blue(s1) & Theme(s1,x3) & Actor(e2,x2) & v_swim(e2) & n_boy(x2) & Actor(e1,x1) & v_smile(e1) & n_boy(x1))
exists e1 x1 x2.(n_sand(x2) & n_boy(x1) & in(e1,x2) & Actor(e1,x1) & v_sit(e1))