People are standing around on a basketball court in an arena.
People are milling about a basketball court.
Standing around and milling about is the same thing.
exists e1 p1 x1 x2 x3 x4.(in(e1,x4) & n_arena(x4) & on(e1,x2) & n_court(x2) & of(x2,x3) & n_basketball(x3) & exists s1.(Theme(s1,x1) & a_around(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_stand(e1) & n_people(x1))
exists e1 x1 x2 x3.(about(e1,x2) & n_court(x2) & of(x2,x3) & n_basketball(x3) & Actor(e1,x1) & v_mill(e1) & n_people(x1))