Several African-American youths are playing on a playground merry-go-round.
There are youths playing on a playground.
African-American youths is the same as  youths
exists e1 s1 s2 x1 x2 x3.(on(e1,x2) & n_merry-go-round(x2) & of(x2,x3) & n_playground(x3) & Actor(e1,x1) & v_play(e1) & n_youth(x1) & a_african-american(s2) & Theme(s2,x1) & a_several(s1) & Theme(s1,x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & on(e1,x4) & n_playground(x4) & Actor(e1,x3) & v_play(e1) & (x2 = x3) & n_youth(x2))