QUESTION: Generate a question with a factual answer?

ANS: Why was barbiturates and amphetamines restricted?

QUESTION: Generate a question with a factual answer?

ANS: Whose independent label became a hub for the industrial scene?

QUESTION: Generate a question with a factual answer?

ANS: What did the integrated system for ADGB link?

QUESTION: Generate a question with a factual answer?

ANS:
What type has the best luminous efficacy?