A little boy swimming in a pool with a mask on.
The boy swims in the ocean.
The boy is either swimming in a pool or the ocean.
exists s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x3) & with(x3,x4) & Theme(s2,x5) & a_on(s2) & (x4 = x5) & n_mask(x4) & n_pool(x3) & n_swimming(x1) & of(x1,x2) & n_boy(x2) & a_little(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_ocean(x2) & n_boy(x1) & in(e1,x2) & Actor(e1,x1) & v_swim(e1))