A man and a woman are crossing over a rope bridge with greenery all over them.
This bridge will collapse if anyone walks across it at all.
The bridge cannot be stable and unstable simultaneously. A couple cannot be crossing over a bridge if it will collapse if anyone walks across.
exists e1 x1 x2 x3 x4 x5 x6.(over(e1,x4) & with(x4,x6) & n_all(x6) & over(x6,x2) & n_thing(x2) & n_greenery(x6) & n_bridge(x4) & of(x4,x5) & n_rope(x5) & Actor(e1,x1) & v_cross(e1) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
exists x3.(n_bridge(x3) & (all x1.((n_thing(x1) & n_person(x1)) -> exists e1.(all x2.(n_thing(x2) -> at(e1,x2)) & across(e1,x1) & Actor(e1,x1) & v_walk(e1))) -> exists e2.(Actor(e2,x3) & v_collapse(e2))))