A person is doing a back flip while other people and cars go by in the background.
The people are performing a routine.
People and cars in the background are not necessarily performing a routine,
exists e1 p1 s1 x1 x2 x5 x7.(n_background(x7) & n_people(x5) & exists e2 s2 x3 x4 x6.(in(e2,x7) & a_by(s2) & Manner(e2,s2) & Actor(e2,x3) & v_go(e2) & subset_of(x6,x3) & n_car(x6) & subset_of(x4,x3) & -(x4 = x5) & n_people(x4)) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_flip(x2) & a_back(s1) & Theme(s1,x2) & n_person(x1))
exists e1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_routine(x2))