Man doing a flip over concrete in front of people.
There is nobody around when the man does a flip.
If he is in front of people, there is certainly not nobody around.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(e1,x5) & of(x5,x6) & n_people(x6) & n_front(x5) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & over(x3,x4) & n_concrete(x4) & n_flip(x3) & (x1 = x2) & n_man(x1))
exists p1 x1 x3.(n_man(x3) & -exists p2 x2.((x1 = x2) & exists e1 x4.(Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & n_flip(x4)) & when(x2,p2) & r_around(x2) & n_person(x2)))