A boy swimming who is wearing goggles.
the boy does the breast stroke
when a boy is doing breast stroke he not only have to wear goggles
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_goggles(x4) & (x1 = x3) & n_swimming(x1) & of(x1,x2) & n_boy(x2))
exists e1 x1 x2 x3.(n_stroke(x2) & of(x2,x3) & n_breast(x3) & n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1))