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

Context : Robert Ledley died of Alzheimer's disease in Kensington, Maryland, USA on July 24, 2012. 
Question : Which medical condition does Robert Ledley suffer from?
Alzheimer's disease

Context : Alexander Wendt was born in 1958 in Mainz in West Germany, and studied political science and philosophy at Macalester College before receiving his Ph.D. in political science from the University of Minnesota in 1989, studying under Raymond ``Bud'' Duvall. 
Question : What is the name of university that educated Alexander Wendt?
University of Minnesota

Context : ISO 3166-2:TJ is the entry for Tajikistan 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:TJ?

International Organization for Standardization