Two people riding a motorcycle.
Two girls go for a ride on a motorcyle.
Not all people who ride motorcycles are girls.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_motorcycle(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(for(e1,x2) & on(x2,x3) & n_motorcyle(x3) & n_ride(x2) & Actor(e1,x1) & v_go(e1) & n_girl(x1) & card_eq_2(x1))