Simplify the following text for a Grade 4 native English-speaking person.
Original: Ninan Cuyochi , who was Inca for only a few days in 1527 , is sometimes left off the list of Sapa Incas because news of his death from smallpox arrived in Cusco shortly after he was declared Sapa Inca .
Simplified: Sapa Inca was the title of the Inca emperor .