The man and woman show off their matching skull tattoos.
There are people comparing skin art.
The man and woman are people and tattoos are skin art.
exists e1 s1 s2 x1 x2 x3 x4 x5.(n_tattoo(x4) & of(x4,x5) & n_skull(x5) & a_matching(s1) & Theme(s1,x4) & of(x4,x2) & n_thing(x2) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1) & a_off(s2) & Manner(e1,s2) & Theme(e1,x4) & Actor(e1,x1) & v_show(e1))
exists p1 x1 e1 x2 x3 x4 x5.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_compare(e1) & n_art(x4) & of(x4,x5) & n_skin(x5) & (x2 = x3) & n_people(x2))