A young boy in swim attire steps into the waves.
A small boy runs into the water to his waiting father.
A boy stepping into the waves isn't necessarily running, nor is he necessarily going to his father.
exists s1 x1 x2 x3 x4 x5.(n_wave(x5) & a_topic(x1) & into(x1,x5) & in(x1,x2) & n_step(x2) & of(x2,x4) & n_attire(x4) & of(x2,x3) & n_swim(x3) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e2 e1 s1 x1 x2 x3.(n_father(x3) & Actor(e2,x3) & v_wait(e2) & of(x3,x2) & n_male(x2) & n_water(x2) & to(e1,x3) & into(e1,x2) & Actor(e1,x1) & v_run(e1) & n_boy(x1) & a_small(s1) & Theme(s1,x1))