Two people in life jackets in a rowboat
The people are swimming.
One cannot be in a rowboat and swimming at the same time.
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 e1 x1.(n_people(x1) & Actor(e1,x1) & v_swim(e1))