An arm with a tattoo is covering part of the picture of the couple.
A person's arm and a photo.
An arm with a tattoo implies a person's arm, and photo is a synonym for picture.
exists e1 x1 x2 x3 x4 x5.(n_couple(x5) & n_picture(x4) & Theme(e1,x3) & Actor(e1,x1) & v_cover(e1) & of(x3,x4) & of(x4,x5) & n_part(x3) & with(x1,x2) & n_tattoo(x2) & n_arm(x1))
exists s1 x1 x2 x3.(a_topic(s1) & subset_of(x3,s1) & n_photo(x3) & subset_of(x2,s1) & n_arm(x2) & of(x2,x1) & n_person(x1))