A BMX motorcyclist dressed in protective gear and helmet, attempting a jump on a sandy dune.
A BMX biker is riding on a dune.
A BMX motorcyclist or biker wears protective gear when riding or jumping on sandy dunes.
exists e2 e1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(a_topic(x1) & for(e1,e2) & Theme(e2,x7) & Actor(e2,x3) & v_attempt(e2) & on(x7,x8) & n_dune(x8) & a_sandy(s2) & Theme(s2,x8) & n_jump(x7) & in(e1,x4) & n_helmet(x6) & n_gear(x5) & subset_of(x6,x4) & subset_of(x5,x4) & a_protective(s1) & Theme(s1,x4) & Theme(e1,x3) & v_dress(e1) & (x1 = x3) & n_motorcyclist(x1) & (x1 = x2) & ne_org_bmx(x2))
exists e1 x1 x2 x3.(on(e1,x3) & n_dune(x3) & Actor(e1,x1) & v_ride(e1) & n_biker(x1) & (x1 = x2) & ne_org_bmx(x2))