A skull of rowers on a lake.
A synchronized swim team is in the lake.
A skull of rowers or a synchronized swim team, can not be both that we are describing. Also they are either on the lake or in the lake, on does not mean in.
exists x1 x2 x3.(a_topic(x1) & of(x1,x2) & on(x2,x3) & n_lake(x3) & n_rower(x2) & n_skull(x1))
exists p1 s1 x1 x2 x3.(n_lake(x3) & in(x1,x3) & n_team(x1) & of(x1,x2) & n_swim(x2) & a_synchronized(s1) & Theme(s1,x1))