Generate a correct and concise answer for the question based on the words in the context.

[EX Q]: Context : ISO 3166-2:ZA is the entry for South Africa in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. 
Question : Who set the standards for ISO 3166-2:ZA?
[EX A]: International Organization for Standardization

[EX Q]: Context : Auguste Deter (German pronunciation: (aʊ̯ˈɡʊstə ˈdeːtɐ); 16 May 1850 -- 8 April 1906) is the first person diagnosed with Alzheimer's disease. 
Question : What led to Auguste Deter's death?
[EX A]: Alzheimer's disease

[EX Q]: Context : Some Egyptologists hold that Menes is the same person as Hor-Aha and that he inherited an already-unified Egypt from Narmer; others hold that Narmer began the process of unification but either did not succeed or succeeded only partially, leaving it to Menes to complete. 
Question : What was replaced Narmer?
[EX A]:
Hor-Aha