Two men in protective gear weld with bright sparks.
The men are playing chess.
The man can't be welding when they are playing chess.
exists s1 s2 x1 x2 x3 x4.(a_topic(x1) & with(x1,x4) & n_sparks(x4) & a_bright(s2) & Theme(s2,x4) & in(x1,x2) & n_weld(x2) & of(x2,x3) & n_gear(x3) & a_protective(s1) & Theme(s1,x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_chess(x2))