Query to get all bus stations and sBhan station data for Berlin from openstreetmap

I am very new with openstreetmap and i am doing my university assignment. I am trying to get all bus station and sBhan data for Berlin in jsonform or any other useful form.

I tried following but its not looks correct. overpass-turbo

[out:json][timeout:25];
// gather results
(
// query part for: “bar”
node["amenity"="bus"]({{bbox}});
way["amenity"="bus"]({{bbox}});
relation["amenity"="bus"]({{bbox}});
);
// print results
out body;
>;
out skel qt;

I would be great if some guide me how correctly i can access for bus and sBhan.