Several people practicing the sport of curling on an ice rink.
The curling stone is on the ice rink.
If they are practicing curling on an ice rink, it would follow that the curling stone is on the ice rink.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(n_sport(x3) & a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_practice(e2) & on(e1,x5) & n_rink(x5) & of(x5,x6) & n_ice(x6) & Actor(e1,x4) & v_curl(e1) & (x3 = x4) & (x1 = x2) & n_people(x1) & a_several(s1) & Theme(s1,x1))
exists p1 x1 x2 x3 x4.(n_rink(x3) & of(x3,x4) & n_ice(x4) & n_stone(x1) & of(x1,x2) & n_curling(x2) & on(x1,x3))