A large fish breaching the water's surface.
An old tire floats by the boat.
A fish and a tire are not the same. Breaching is not floating.
exists e1 s1 x1 x2 x3 x4.(n_surface(x4) & of(x4,x3) & n_water(x3) & a_topic(x1) & Theme(e1,x4) & Actor(e1,x2) & v_breach(e1) & (x1 = x2) & n_fish(x1) & a_large(s1) & Theme(s1,x1))
exists s1 x1 x2 x3.(n_boat(x3) & a_topic(x1) & by(x1,x3) & n_float(x1) & of(x1,x2) & n_tire(x2) & a_old(s1) & Theme(s1,x1))