A boy smiles and swims in blue water.
The boy is swimming.
A boy swimming in blue water is swimming.
exists e2 e1 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 p1 x1.(n_boy(x1) & exists x2.((x1 = x2) & n_swimming(x2)))