Extracting parts of animations with Python

Hello. I resolved the problem of import a large .blend scene with Python. Now I’m trying to extract parts of interest of the scene.

For example, I wish in a Big Buck Bunny scene extract only the scene where the rabbit stretches early out its hole, only the rabbit character. But I don’t know how to do it.

I tried deleting parts in the Outliner to obtain a new .blend; or appending/linking parts of the model in a new scene. But I didn’t find which or where are the parts or how to apply the correct frames. I’m researching too, but I didn’t find something about it yet.

¿Where I can find more about extract parts of scenes, or how I can get an approach to use or apply the parts of scene I’m interested? Thank U again (.