A man in blue leans over the sea wall to fish.
A man in blue leans over the boat to throw up.
Throwing up over a boat is not the same as fishing over a sea wall.
exists p1 s1 x1 x2 x3 x4.(n_wall(x3) & of(x3,x4) & n_sea(x4) & a_topic(x1) & in(x1,x2) & over(x2,x3) & Topic(x3,p1) & exists e1.(Actor(e1,x3) & v_fish(e1)) & n_lean(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))
exists p1 s1 x1 x2 x3.(n_boat(x3) & a_topic(x1) & in(x1,x2) & over(x2,x3) & Topic(x3,p1) & exists e1 s2.(a_up(s2) & Manner(e1,s2) & Actor(e1,x3) & v_throw(e1)) & n_lean(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))