For learning SPARQL it might be useful to have full control both over the query text and the data (RDF triples). While there are many public SPARQL endpoints av
glove
beacon
autoscalemode
magicavoxel
data-lake
git-http-backend
zipper
pipenv
keyhook
datetime-local
strconv
appx
hugsql
mediawiki-extensions
c++-actor-framework
osx-tiger
icingaweb2
awesome-wm
google-cloud-shell
cab
federated-table
thumbor
tailscale
type-parameter
rollbar
windows-firewall-api
gino
react-ga
django-tinymce
avmetadataitem