A group of young and old practice together for an instrumental performance.
People are violently hitting each other with instruments.
either the people are practicing together or violently hitting each othet
exists s1 s2 s3 x1 x2 x3.(a_topic(x1) & for(x1,x3) & n_performance(x3) & a_instrumental(s3) & Theme(s3,x3) & r_together(x1) & of(x1,x2) & n_practice(x2) & a_old(s2) & Theme(s2,x2) & a_young(s1) & Theme(s1,x2) & n_group(x1))
exists x1.(all x2.(n_other(x2) -> exists e1 s1 x3.(a_violently(s1) & Manner(e1,s1) & with(e1,x3) & n_instrument(x3) & Theme(e1,x2) & Actor(e1,x1) & v_hit(e1))) & n_people(x1))