QUESTION: Generate a question with a factual answer?

ANS: Who investigated the efficiency of high-brightness LED at Cardiff University in 1995?

QUESTION: Generate a question with a factual answer?

ANS: What was the first song released by Candice Glover after winning American Idol?

QUESTION: Generate a question with a factual answer?

ANS: When were Slavic languages recognized as Indo-European?

QUESTION: Generate a question with a factual answer?

ANS:
What happened to Eannatum's empire after his death?