Man holding a water pipe.
A man is a plumber.
Holding a water pipe doesn't mean he's a plumber.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & n_pipe(x3) & of(x3,x4) & n_water(x4) & (x1 = x2) & n_man(x1))
exists p1 x1.(exists x2.((x1 = x2) & n_plumber(x2)) & n_man(x1))