Four people are holding an american flag in the middle of a bunch of people.
The flag is at half mast on the pole.
The people can't be holding the flag at the same time as the flag is on the pole.
exists e1 s1 x1 x2 x3 x4 x5.(n_middle(x3) & in(e1,x3) & of(x3,x4) & of(x4,x5) & n_people(x5) & n_bunch(x4) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_flag(x2) & a_american(s1) & Theme(s1,x2) & n_people(x1) & card_eq_4(x1))
exists p1 x1 x4.(n_pole(x4) & n_flag(x1) & exists x2 x3.(at(x1,x2) & on(x2,x4) & n_mast(x2) & of(x2,x3) & n_half(x3)))