A bride and groom riding in a limo.
A bride and groom are being chauffeured.
Are being chauffeured is a rephrase of riding in a limo.
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x4) & n_limo(x4) & n_riding(x1) & of(x1,x3) & n_groom(x3) & of(x1,x2) & n_bride(x2))
exists e1 x1 x2 x3.(Theme(e1,x1) & v_chauffeur(e1) & n_groom(x3) & n_bride(x2) & subset_of(x3,x1) & subset_of(x2,x1))