A military unit in a parade.
There is no parade today
If there is no parade today then they cannot be a military unit in a parade.
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_parade(x2) & n_unit(x1) & a_military(s1) & Theme(s1,x1))
exists p1 x1 x2.(Time(p1,x2) & n_today(x2) & -exists x3.((x1 = x3) & n_parade(x3)))