An ice skating couple performs in an arena.
A family enjoys a day at the beach.
A family is more people than a couple.  An arena is not a beach, and you cannot be ice skating on a beach.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x5) & n_arena(x5) & Theme(e1,x3) & Actor(e1,x2) & v_skate(e1) & n_perform(x3) & of(x3,x4) & n_couple(x4) & (x1 = x2) & n_ice(x1))
exists e1 x1 x2 x3.(n_beach(x3) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_day(x2) & n_family(x1))