Question: Tell me the mathematical model that contains the word theory in their name
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q486902 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'theory')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25