A man and woman fishing at the beach.
A man is teaching a woman how to catch salmon.
When a man is fishing with a woman he is not always teaching a woman how to fish. Two people fishing are not necessarily trying to catch salmon. They could be trying to catch some other kind of fish.
exists s1 x1 x2 x3 x4.(n_beach(x4) & a_topic(s1) & subset_of(x2,s1) & at(x2,x4) & n_fishing(x2) & of(x2,x3) & n_woman(x3) & subset_of(x1,s1) & n_man(x1))
exists e1 p1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_teach(e1) & Topic(x2,p1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_catch(e2) & n_salmon(x3)) & n_woman(x2) & n_man(x1))