Teacher:Generate a correct and concise answer for the question based on the words in the context.
Teacher: Now, understand the problem? Solve this instance: Context : Leonidas died in 2004 in Cotia, Sao Paulo, because of complications due to Alzheimer's disease, from which he had been suffering since 1974.
Question : What medical condition was Leonidas suffering from?
Student:
Alzheimer's disease