A band of musicians performing for a rally.
People are at a rally.
If musicians are performing for a rally then people are at a rally.
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & for(e1,x4) & n_rally(x4) & Actor(e1,x3) & v_perform(e1) & (x2 = x3) & n_musician(x2) & n_band(x1))
exists p1 x1.(exists x2.(at(x1,x2) & n_rally(x2)) & n_people(x1))