The teenagers are fighting over a basketball during a game.
A fight is about to break out.
Just because they are fighting over a basketball does not mean that they are about to fight.  Fighting over a basketball could refer to the act of trying to claim the ball which is common in basketball.
exists e1 x1 x2 x3.(n_teenager(x1) & during(e1,x3) & n_game(x3) & over(e1,x2) & n_basketball(x2) & Actor(e1,x1) & v_fight(e1))
exists p1 s1 x1.(Topic(s1,p1) & Actor(s1,x1) & a_about(s1) & exists e1 s2.(a_out(s2) & Manner(e1,s2) & Actor(e1,x1) & v_break(e1)) & n_fight(x1))