An off-road biker taking a step curve.
A person races in a mountain biking competition.
We don't know if the biker is necessarily in a mountain biking competition.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_take(e1) & Time(x3,x4) & n_curve(x4) & n_step(x3) & (x1 = x2) & n_biker(x1) & a_off-road(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x3) & n_competition(x3) & Actor(e1,x3) & v_bike(e1) & of(x3,x4) & n_mountain(x4) & Time(x1,x2) & n_race(x2) & n_person(x1))