Question: Tell me hypothesis whose name has the word substratum in it.
Paraphrase: Tell me the hypothesis in which the word substratum has its name.
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q41719 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'substratum')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: Vasconic substratum theory, Vasconic substratum theory