Girl is fishing by the calm lake.
A girl rides a raft down a river.
Fishing is not riding and a lake is not a river
exists p1 s1 x1 x3.(n_lake(x3) & a_calm(s1) & Theme(s1,x3) & ne_nam_girl(x1) & exists x2.((x1 = x2) & by(x2,x3) & n_fishing(x2)))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & down(x2,x3) & n_river(x3) & n_raft(x2) & n_girl(x1))