a person sits at a table behind a tree.
A person is running.
The person is sitting, not running.
exists e1 x1 x2 x3.(behind(e1,x3) & n_tree(x3) & at(e1,x2) & n_table(x2) & Actor(e1,x1) & v_sit(e1) & n_person(x1))
exists e1 x1.(Actor(e1,x1) & v_run(e1) & n_person(x1))