Question: Who is Infanta Elena, Duchess Of Lugo's maternal grandmother?
Sentence (from "Infanta Elena, Duchess of Lugo"): (Elena María Isabel Dominica de Silos de Borbón y de Grecia; born 20 December 1963) is the first child and elder daughter of King Juan Carlos I of Spain and Queen Sofía of Spain, and third in the line of succession to the Spanish throne.
Relevant evidence: Yes