Two person are riding their bicycles.
The people are getting some exercise.
Two person are people, and riding their bicycles implies getting some exercise.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2) & of(x2,x1) & n_thing(x1) & n_person(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_get(e1) & n_exercise(x2))