A crowd of people at some kind of protest.
A protest against war.
Not all protests are done for war. Just because it is crowded doesn't mean it is a protest.
exists x1 x2 x3 x4.(a_topic(x1) & at(x1,x3) & of(x3,x4) & n_protest(x4) & n_kind(x3) & of(x1,x2) & n_people(x2) & n_crowd(x1))
exists x1 x2.(a_topic(x1) & against(x1,x2) & n_war(x2) & n_protest(x1))