A man wearing a helmet is on a bicycle in the air while people in the background watch him.
There is a man without a helmet in a car while no one watches.
People in the background watch a man.    This is not the man without a helmet in the car while no one watches.  People in the background watch a man wearing a helmet on a  bicycle.
exists e1 p1 s1 x1 x2 x3 x4 x5 x6 x8.(n_watch(x5) & of(x5,x6) & n_background(x6) & n_air(x8) & a_he(s1) & Manner(p1,s1) & while(p1,x4) & in(x4,x5) & n_people(x4) & exists x7.(on(x1,x7) & in(x7,x8) & n_bicycle(x7)) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_helmet(x3) & (x1 = x2) & n_man(x1))
exists p1 p2 x1.(-exists e1 x5.(Actor(e1,x5) & v_watch(e1) & n_one(x5)) & while(p1,p2) & -exists x3 x4.(with(p1,x3) & in(x3,x4) & n_car(x4) & n_helmet(x3)) & exists x2.((x1 = x2) & n_man(x2)))