how can i filter the duplicated shapes (small shapes inside a big shape)?

Hello every one, I am new to opensreetmap but i found it is a great project.

I am trying to statisc the green space in a city (i got the geojson,then i treat it by geopandas of python) So i use overpass to get all the elements of natural.

But the pb is that the geometry sharpes is covered and mixted. for example:

          - parks in parks, 
          - garden in parks

` - etc

I just want all the indepent shapes (filter the samll shapes inside if exsits), i readed the wiki,but i did not find a specific solution, do you have any advice?

Thanks in advance

QL code [out:json][timeout:25]; // gather results ( // query part

  way["leisure"="garden"]({{bbox}});
  relation["leisure"="garden"]({{bbox}});

  way["leisure"="golf_course"]({{bbox}});
  relation["leisure"="golf_course"]({{bbox}});

  way["leisure"="park"]({{bbox}});
  relation["leisure"="park"]({{bbox}});

  way["leisure"="dog_park"]({{bbox}});
  relation["leisure"="dog_park"]({{bbox}});

  way["leisure"="pitch"]({{bbox}});
  relation["leisure"="pitch"]({{bbox}});

 way["landuse"="village_green"]({{bbox}});
 way["landuse"="meadow"]({{bbox}});
 way["landuse"="forest"]({{bbox}});
 relation["landuse"="forest"]({{bbox}});

);
// print results
out body;
>;
out skel qt;