Two men are holding papers, while one of them writes something.
Two men are reading books.
writes is contradictory to reading
exists e1 p1 x1 x2.(exists e2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_write(e2) & n_thing(x4) & of(x3,x1) & n_thing(x3) & card_eq_1(x3)) & n_thing(x1) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_papers(x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_read(e1) & n_book(x2) & n_man(x1) & card_eq_2(x1))