Question: What type of geology of anorthite is monitored by the Vesuvius Observatory during eruptions?
Paraphrase: What kind of geology of anorthite is monitored by means of the Vesuvius Observatory at some point of eruptions?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q244994 wdt:P2695 ?answer . ?answer wdt:P3815 wd:Q967776}
Answer: Mount Somma