Some ladies are looking at materials on a table.
Some ladies are placing food on a table.
They would not be able to look at materials on a table while placing food on that same table.
exists e1 x1 x2 x3.(on(e1,x3) & n_table(x3) & at(e1,x2) & n_material(x2) & Actor(e1,x1) & v_look(e1) & n_lady(x1))
exists e1 x1 x2 x3.(on(e1,x3) & n_table(x3) & Theme(e1,x2) & Actor(e1,x1) & v_place(e1) & n_food(x2) & n_lady(x1))