A lady working on a machine.
A lady is trying to repair a machine to make it work again
Just because she is working on a machine does not mean she is trying to repair it.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_machine(x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_lady(x1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 p2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_repair(e2) & Topic(x2,p2) & exists e3 p3.(exists e4 s1.(a_again(s1) & Manner(e4,s1) & Actor(e4,x1) & v_work(e4)) & Recipient(e3,p3) & Actor(e3,x2) & Topic(e3,x1) & v_make(e3)) & n_machine(x2)) & n_thing(x1) & n_lady(x1))