People stand on a colorful balcony.
The couple stand on the streets looking up at a balcony.
Couple is two person whereas people is a group of more than two  People who stand on a colorful balcony cannot be on the streets
exists e1 s1 x1 x2.(on(e1,x2) & n_balcony(x2) & a_colorful(s1) & Theme(s1,x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1))
exists e1 s1 x1 x2 x3 x4.(n_street(x3) & n_stand(x1) & of(x1,x2) & n_couple(x2) & a_up(s1) & Manner(e1,s1) & at(e1,x4) & n_balcony(x4) & Actor(e1,x1) & v_look(e1) & on(x1,x3))