Complex sentence: He moved to Spain after following his uncle Antoine, the Duke of Montpensier ´ s orientation, as he lived there since his marriage to the princess Luisa Fernanda, sister of Isabella II, queen of Spain.
Split into simpler sentences: He moved to Spain, after following his uncle, Antoine, the Duke of Montpensier's orientation. The Duke had lived there since his marriage to Princess Luisa Fernanda, sister of Queen Isabella II, of Spain.