One man is working on a wristwatch while another checks his work.
One man is working on a wrist watch to repair it.
Sentence 1 is missing repair watch.
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 e1 p1 x1 x2 x3 x4.(Topic(e1,p1) & exists e2.(Theme(e2,x2) & Actor(e2,x1) & v_repair(e2)) & n_thing(x2) & on(e1,x3) & n_watch(x3) & of(x3,x4) & n_wrist(x4) & Actor(e1,x2) & v_work(e1) & n_man(x2) & card_eq_1(x2) & n_man(x1) & card_eq_1(x1))