The musicians are rehearsing for the event, possibly at school or even a concert
People are walking along the beach.
Either the musicians are rehearsing for the event, or people are walking along the beach
exists e1 x1 x2.(n_event(x2) & n_musician(x1) & (exists x3.(r_possibly(e1) & at(e1,x3) & n_school(x3)) | exists x4.(r_possibly(e1) & at(e1,x4) & r_even(x4) & n_concert(x4))) & for(e1,x2) & Actor(e1,x1) & v_rehearse(e1))
exists e1 x1 x2.(n_beach(x2) & along(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))