Two bicycle riders are riding along a road.
There are two people sleeping.
One cannot be riding a bicycle and sleeping simultaneously.
exists e1 x1 x2 x3.(along(e1,x3) & n_road(x3) & Actor(e1,x1) & v_ride(e1) & n_rider(x1) & of(x1,x2) & n_bicycle(x2) & card_eq_2(x1))
exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_sleep(e1) & (x2 = x3) & n_people(x2) & card_eq_2(x2))