If you deviate a little from the examples in the article GPT-4 gets it all wrong:
Who is the eighth Federal Chancellor of the Federal Republic of Germany? - Olaf Scholz (wrong, Angela Merkel)
https://chat.openai.com/share/937795ea-bd91-43ee-bd76-1a125f...
Who was the eighth Federal Chancellor of the Federal Republic of Germany? - Helmut Kohl (wrong, Angela Merkel)
https://chat.openai.com/share/937795ea-bd91-43ee-bd76-1a125f...
Interestingly whether you put is or was into the question does make a difference.
Even when allowed to surf the web, ChatGPT gets it wrong:
Who was the eighth Federal Chancellor of the Federal Republic of Germany? - Gerhard Schröder (wrong, Angela Merkel)
https://chat.openai.com/share/867cb3bc-f642-4d2a-b80d-fe8dc0...
Though it's referring to the right Wikipedia page: https://en.m.wikipedia.org/wiki/List_of_chancellors_of_Germa...