Complex sentence: Leonor de Cisneros (Valladolid, 1536--Valladolid, 26 September 1568), was a Spanish protestant who was executed for heresy by the Spanish Inquisition as a protestant martyr.
Split into simpler sentences: Leonor de Cisneros (Valladolid, 1536--Valladolid, 26 September 1568), was a Spanish protestant. She was executed for heresy by the Spanish Inquisition and was regarded a protestant martyr.