A boat floats down a river with lush forest on either side.
there are children in boat
We don't know for sure that the boat has children.
exists e1 s1 s2 x1 x2 x3.(all x4.(n_side(x4) -> on(e1,x4)) & a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_float(e1) & with(x2,x3) & n_forest(x3) & a_lush(s1) & Theme(s1,x3) & n_river(x2) & n_boat(x1))
exists p1 x1 x2 x3.((x1 = x2) & in(x2,x3) & n_boat(x3) & n_child(x2))