Two people in life jackets in a rowboat
Two people are in a rowboat.
Both subjects are in a rowboat
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & in(x2,x4) & n_rowboat(x4) & n_jacket(x2) & of(x2,x3) & n_life(x3) & n_people(x1) & card_eq_2(x1))
exists p1 x1.(exists x2.(in(x1,x2) & n_rowboat(x2)) & n_people(x1) & card_eq_2(x1))