A man guides his water buffalo through a marsh.
A man sitting at a campfire.
A man is not able to guides his water buffalo and be sitting at a campfire.
exists e1 x1 x2 x3 x4.(through(e1,x4) & n_marsh(x4) & Theme(e1,x2) & Actor(e1,x1) & v_guide(e1) & n_buffalo(x2) & of(x2,x3) & n_water(x3) & of(x2,x1) & n_male(x1) & n_man(x1))
exists e1 x1 x2 x3.(a_topic(x1) & at(e1,x3) & n_campfire(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1))