A BMX bicyclist doing a very dangerous trick in some sort of competition.
A race car driver doing a very dangerous trick in some sort of competition.
A BMX bicyclist would be doing tricks on some sort of bike, a race car driver is in a car.
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(e1,x5) & of(x5,x6) & n_competition(x6) & n_sort(x5) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & n_trick(x4) & a_dangerous(s1) & Theme(s1,x4) & r_very(x4) & (x1 = x3) & n_bicyclist(x1) & (x1 = x2) & ne_org_bmx(x2))
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & in(e1,x6) & of(x6,x7) & n_competition(x7) & n_sort(x6) & Theme(e1,x5) & Actor(e1,x4) & v_do(e1) & n_trick(x5) & a_dangerous(s1) & Theme(s1,x5) & r_very(x5) & (x1 = x4) & n_driver(x1) & of(x1,x3) & n_car(x3) & of(x1,x2) & n_race(x2))