The cup is shiny.
The cup is metal
The act of a cup being shiny does not imply that that cup has to be metal. There are many other materials that are shiny.
exists s1 x1.(n_cup(x1) & Theme(s1,x1) & a_shiny(s1))
exists p1 x1.(n_cup(x1) & exists x2.((x1 = x2) & n_metal(x2)))