People are standing while waiting to the exit area.
The people are waiting in line to leave
People waiting in like to leave implies same as standing while waiting to exit area.
exists e2 e1 x1 x2 x3.(n_area(x2) & of(x2,x3) & n_exit(x3) & while(e1,e2) & to(e2,x2) & Actor(e2,x1) & v_wait(e2) & Actor(e1,x1) & v_stand(e1) & n_people(x1))
exists e1 p1 x1 x2.(n_people(x1) & Topic(e1,p1) & exists e2.(Actor(e2,x1) & v_leave(e2)) & in(e1,x2) & n_line(x2) & Actor(e1,x1) & v_wait(e1))