The dressed up young people are sitting in chairs while they wait.
The young people are dressed in tuxedos.
The dressed up young people are sitting in chairs while they wait does not mean that they are dressed in tuxedos.
exists e1 e2 p1 s1 x1 x2.(n_thing(x1) & n_people(x1) & a_young(s1) & Theme(s1,x1) & r_up(x1) & Theme(e1,x1) & v_dress(e1) & exists e3.(Actor(e3,x1) & v_wait(e3)) & while(e2,p1) & in(e2,x2) & n_chair(x2) & Actor(e2,x1) & v_sit(e2))
exists e1 s1 x1 x2.(n_people(x1) & a_young(s1) & Theme(s1,x1) & in(e1,x2) & n_tuxedo(x2) & Theme(e1,x1) & v_dress(e1))