A man is sitting on the ground welding something.
A man stands as he lights a candle.
The man can not be sitting and standing at the same time.
exists e1 e2 x1 x2 x3 x4.(n_ground(x2) & on(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_weld(e2) & n_thing(x4) & (x2 = x3) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1.(all x2.(n_candle(x2) -> exists x3.(as(e1,x1) & for(x1,x2) & Time(x1,x3) & n_light(x3))) & n_male(x1) & Actor(e1,x1) & v_stand(e1) & n_man(x1))