One man is working on a wristwatch while another checks his work.
Two men are present there.
If a man is working while another inspects his work, then both are present.
exists e1 x1 x2 x3 x4 x5.(n_check(x2) & n_work(x3) & of(x3,x2) & n_male(x2) & while(e1,x5) & n_check(x5) & -(x5 = x2) & on(e1,x4) & n_wristwatch(x4) & Theme(e1,x3) & Actor(e1,x1) & v_work(e1) & n_man(x1) & card_eq_1(x1))
exists s1 s2 x1.(a_there(s2) & Manner(s1,s2) & Theme(s1,x1) & a_present(s1) & n_man(x1) & card_eq_2(x1))