To find the relationships and entity IDs, you can type the prefix like "wdt:" or "wd:" then type something in English and hit Ctrl-Space. For instance, wd:nucle

To find the relationships and entity IDs, you can type the prefix like "wdt:" or "wd:" then type something in English and hit Ctrl-Space. For instance, wd:nuclear<Ctrl-Space>. Alternatively you can search on wikidata.org. 1) Indeed, there are many other kinds of visualizations available as well (have a look at the examples) 3) the SERVICE is just an easy way to retrieve the name, which is stored in Wikidata, in a reasonable language. You can also access the name directly in SPARQL