a Wikipedia category.
Whenever tools are down I have been adding these alumni to Wikidata. It seems obvious that not all universities and colleges are represented. It is certain that many alumni cannot be found in these categories. This is because there may be no article about them or they have not been included in the category.
It is relatively easy to do this for India given that English is the main language for subjects about India. For China, Russia and Japan it is not so easy. Someone else has to get involved as I do not know the languages.
All of Labs is down again. So this time my customary hyperlinks are sadly absent..