Left hand navigation of activities docs page

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Hi. Trying to get all the activities name along with parent name from https://activities.uipath.com/docs.

Ex: Should get UiPath.PDF.Activities and their child elements. Like this have to extract all the parent and their childs.

createActivityList.xaml (10.2 KB)

Tried get ancestor and find children. But getting only for one element. How can I loop through all the parents in the page?