Two people riding bikes through a mountainous region.
Two people ride red bikes.
Bikes come in all colors, not just red.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & through(e1,x4) & n_region(x4) & a_mountainous(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bike(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & a_red(s1) & Theme(s1,x2) & n_people(x1) & card_eq_2(x1))