A man does a wheelie on a motorcycle while a crowd watches.
There is a man on a motorcycle in front of the crowd.
The man must be on a motorcycle to do a wheelie and if the crowd is watching it can be assumed he is in front of them.
exists e1 p1 x1 x2 x3.(exists e2 x4.(Actor(e2,x4) & v_watch(e2) & n_crowd(x4)) & while(e1,p1) & on(e1,x3) & n_motorcycle(x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_wheelie(x2) & n_man(x1))
exists p1 x1 x5.(n_crowd(x5) & exists x2 x3 x4.((x1 = x2) & on(x2,x3) & in(x3,x4) & of(x4,x5) & n_front(x4) & n_motorcycle(x3) & n_man(x2)))