Question: What are the notable works of Ludwig Wittgenstein?
Paraphrase: What are the striking works of Ludwig Wittgenstein?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q9391 wdt:P800 ?obj . ?obj wdt:P31 wd:Q47461344 } 
Answer: Tractatus Logico-Philosophicus, Philosophical Investigations