Couple riding a few cruiser bikes.
Two people are riding their bikes on the bike trail.
Riding bikes does not imply being on a trail.
all x1 s1 x2.((n_bike(x1) & of(x1,x2) & n_cruiser(x2) & a_few(s1) & Theme(s1,x1)) -> exists x3 x4.(a_topic(x3) & for(x3,x1) & n_riding(x3) & of(x3,x4) & n_couple(x4)))
exists e1 x1 x2 x3.(on(e1,x3) & n_trail(x3) & of(x3,x2) & n_bike(x2) & n_bike(x2) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & of(x2,x1) & n_thing(x1) & n_people(x1) & card_eq_2(x1))