Question: Which is the function of the discoverer Leonhard Euler and contains the word function in it's name?
Paraphrase: Which is the feature of the discoverer Leonhard Euler and includes the phrase characteristic in it's name?
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q11348 . ?sbj wdt:P61 wd:Q7604 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'function')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: Euler's totient function, Euler's totient function, gamma function, gamma function