Two people on a motorcycle.
The bicycle was built for two riders.
A motorcycle and bicycle are two different objects.
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_motorcycle(x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_bicycle(x1) & for(e1,x2) & n_rider(x2) & card_eq_2(x2) & Theme(e1,x1) & v_build(e1))