Three people ride off-road bikes through a field surrounded by trees.
A bike messenger riding down a busy street.
It cannot be three people riding through a field and a bike messenger riding down a street simultaneously.
exists e1 e2 s1 x1 x2 x3 x4 x5.(through(e1,x3) & Actor(e2,x5) & n_tree(x5) & Theme(e2,x4) & v_surround(e2) & (x3 = x4) & n_field(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & a_off-road(s1) & Theme(s1,x2) & n_people(x1) & card_eq_3(x1))
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_street(x4) & a_busy(s1) & Theme(s1,x4) & (x1 = x3) & n_messenger(x1) & of(x1,x2) & n_bike(x2))