People riding their bikes on a trail.
A family is taking a weekend bike ride on a local trail.
IT IS NOT CERTAIN THAT THE PEOPLE ARE A FAMILY. IT IS ALSO NOT CERTAIN THAT THEY ARE RIDING ON A LOCAL TRAIL DURING THE WEEKEND.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_trail(x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bike(x3) & of(x3,x1) & n_thing(x1) & (x1 = x2) & n_people(x1))
exists e1 s1 x1 x2 x3 x4 x5.(Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & on(x2,x5) & n_trail(x5) & a_local(s1) & Theme(s1,x5) & n_ride(x2) & of(x2,x4) & n_bike(x4) & of(x2,x3) & n_weekend(x3) & n_family(x1))