People with their children shopping for tools.
Some children have wandered away from their parents and are lost.
People cannot be with their children if the children have wandered away from their parents and are lost.
exists x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & for(x2,x4) & n_tool(x4) & n_shopping(x2) & of(x2,x3) & n_child(x3) & of(x2,x1) & n_thing(x1) & n_people(x1))
exists e1 e2 x1 x2 x3.(Theme(e2,x3) & v_lose(e2) & n_child(x3) & from(e1,x2) & n_parent(x2) & of(x2,x1) & n_thing(x1) & r_away(e1) & Actor(e1,x1) & v_wander(e1) & n_child(x1))