Heavy metal guitarist plays and screams at a concert.
children are watching
The children may not be watching the concert.
exists s1 s2 x1 x2 x3 x4 x5.(a_topic(s1) & subset_of(x4,s1) & at(x4,x5) & n_concert(x5) & n_scream(x4) & subset_of(x1,s1) & n_play(x1) & of(x1,x3) & n_guitarist(x3) & of(x1,x2) & n_metal(x2) & a_heavy(s2) & Theme(s2,x1))
exists e1 x1.(Actor(e1,x1) & v_watch(e1) & n_child(x1))