Men fish on a concrete slab.
Men are near the water.
One must be near the water to fish.
exists s1 x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_slab(x3) & a_concrete(s1) & Theme(s1,x3) & n_fish(x1) & of(x1,x2) & n_man(x2))
exists p1 x1 x2.(n_water(x2) & near(x1,x2) & n_man(x1))