Two people riding their bikes on a hill.
There are two bikes moving on a hill.
Riding on bikes is considered moving on bikes.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_hill(x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bike(x3) & of(x3,x1) & n_thing(x1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & on(e1,x4) & n_hill(x4) & Actor(e1,x3) & v_move(e1) & (x2 = x3) & n_bike(x2) & card_eq_2(x2))