Here are various tips and tricks you might want to consider when playing in the sandbox:

• On instance record results pages, pick the linked (structured) data icon [] to get a listing of the RDF
• To see the actual SPARQL queries being issued to the various Web services endpoints, append '&wsf_debug=1' or '&wsf_debug=2' (no quotes) to the end of the URL in your browser's address box. debug=1 gives you the Web service requests to the endpoints. debug=2 gives you the queries sent to Virtuoso or Solr.
• In "filtered" displays such as Browse or Search, toggling filters on and off is a good way to understand comparative structural differences between datasets
• More