An old man tying a net for fishing.
The man wants to catch a mermaid.
If the man is tying his net for fishing, it means he wants to catch fish, not a mermaid.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & for(e1,x4) & n_fishing(x4) & Theme(e1,x3) & Actor(e1,x2) & v_tie(e1) & n_net(x3) & (x1 = x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists e1 p1 x1.(n_man(x1) & Topic(e1,p1) & Actor(e1,x1) & v_want(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_catch(e2) & n_mermaid(x2)))