People play with pyrotechnics.
People play with fireworks.
Pyrotechnics is a synonym for fireworks.
exists e1 x1 x2.(with(e1,x2) & n_pyrotechnics(x2) & Actor(e1,x1) & v_play(e1) & n_people(x1))
exists e1 x1 x2.(with(e1,x2) & n_firework(x2) & Actor(e1,x1) & v_play(e1) & n_people(x1))