A man standing next to a vendor.
A woman is sitting near a vendor.
There can either be a man or a woman. They can either be sitting or standing, but not both simultaneously
exists e1 x1 x2 x3.(a_topic(x1) & to(e1,x3) & n_vendor(x3) & r_next(e1) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(near(e1,x2) & n_vendor(x2) & Actor(e1,x1) & v_sit(e1) & n_woman(x1))