Triangular blue and red flags flutter in the wind.
The flags are moving.
Flutter in the wind shows the flags are moving.
exists s1 s2 s3 x1 x2 x3.(n_wind(x3) & a_topic(x1) & in(x1,x3) & n_flutter(x1) & of(x1,x2) & n_flag(x2) & a_red(s3) & Theme(s3,x1) & a_blue(s2) & Theme(s2,x1) & a_triangular(s1) & Theme(s1,x1))
exists e1 x1.(n_flag(x1) & Actor(e1,x1) & v_move(e1))