Three female soccer players collide when trying to headbutt the ball.
the females are playing soccer
Headbutting a ball is what happens when playing soccer. When female soccer players are trying to headbutt the ball, they're playing soccer.
exists e1 e2 p1 s1 x1 x2 x3.(n_ball(x3) & when(e1,e2) & Topic(e2,p1) & Actor(e2,x1) & v_try(e2) & exists e3.(Theme(e3,x3) & Actor(e3,x1) & v_headbutt(e3)) & Actor(e1,x1) & v_collide(e1) & n_player(x1) & of(x1,x2) & n_soccer(x2) & a_female(s1) & Theme(s1,x1) & card_eq_3(x1))
exists e1 x1 x2.(n_female(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_soccer(x2))