Young individuals in uniforms are gathering under the flags of several different countries.
People congregate beneath the flag that represents their country.
Just because they are gathering under flags of several different countries doesn't mean the flag represents their country.
exists e1 s1 s2 x1 x2 x3 x4 x5.(n_country(x5) & n_flag(x3) & under(e1,x3) & of(x3,x4) & -(x4 = x5) & n_country(x4) & a_several(s2) & Theme(s2,x4) & Actor(e1,x1) & v_gather(e1) & in(x1,x2) & n_uniform(x2) & n_individual(x1) & a_young(s1) & Theme(s1,x1))
exists e2 e1 x1 x2 x3 x4.(n_country(x4) & of(x4,x2) & n_thing(x2) & n_flag(x2) & beneath(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_represent(e2) & (x2 = x3) & Actor(e1,x1) & v_congregate(e1) & n_people(x1))