A man is sitting on the roof.
A person is taking a break after working on fixing his house.
A man sitting on the roof is not necessarily taking a break.
exists e1 x1 x2.(n_roof(x2) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e3 e2 e1 x1 x2 x3 x4.(after(e1,e2) & on(e2,e3) & Theme(e3,x4) & Actor(e3,x3) & v_fix(e3) & n_house(x4) & of(x4,x1) & n_male(x1) & Actor(e2,x1) & v_work(e2) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_break(x2) & n_person(x1))