$ curl 'https://archive.internal.softwareheritage.org/api/1/graph/neighbors/swh:1:cnt:c839dea9e8e6f0528b468214348fee8669b305b2/?direction=backward'
swh:1:dir:ded70c63b81f585ad410703aab9a2a75c090a655
swh:1:dir:b94a90cd37b572636244856a02214da21504e754
swh:1:dir:fa8c090895a208acd20c68f1f7760bac95178725
swh:1:dir:6ca2e4447601e1ba60c298635407f00b926cb23e
swh:1:dir:7af5ccd92f836f10d90365e5d0729c907dff39a8
swh:1:dir:b4f7117ff0cc53184fc11a1999742bc561bffdbd
$ curl 'https://archive.internal.softwareheritage.org/api/1/graph/neighbors/swh:1:cnt:c839dea9e8e6f0528b468214348fee8669b305b2?direction=backward' 
$