People sit on the curb watching an event.
People sit on a curb and watch musicians perform during the international music festival.
One can't assume people who sit on a curb and watch an event are watching musicians perform during the international music festival.
exists e2 e1 x1 x2 x3.(n_curb(x2) & for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_watch(e2) & n_event(x3) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1))
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_festival(x7) & of(x7,x8) & n_music(x8) & a_international(s1) & Theme(s1,x7) & on(e1,x2) & during(e2,x7) & Theme(e2,x6) & Actor(e2,x5) & v_perform(e2) & (x2 = x6) & n_musician(x5) & n_watch(x4) & n_curb(x3) & subset_of(x4,x2) & subset_of(x3,x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1))