A biker is in midair doing a stunt.
A biker runs through a crowd of people.
either the biker is on the bike or is running
exists p1 x1.(exists e1 x2 x3 x4.(in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & n_stunt(x4) & (x2 = x3) & n_midair(x2)) & n_biker(x1))
exists e1 x1 x2 x3.(through(e1,x2) & of(x2,x3) & n_people(x3) & n_crowd(x2) & Actor(e1,x1) & v_run(e1) & n_biker(x1))