The man and woman show off their matching skull tattoos.
The people are sleeping.
People cannot be showing off while they sleep.
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 e1 x1.(n_people(x1) & Actor(e1,x1) & v_sleep(e1))