QUESTION: Generate a question with a factual answer?

ANS: When were the most recent elections in Swaziland?

QUESTION: Generate a question with a factual answer?

ANS: On what day was Kanye's women's line premiered at Paris fashion week?

QUESTION: Generate a question with a factual answer?

ANS: When did the torch visit New Delhi?

QUESTION: Generate a question with a factual answer?

ANS:
Antiparticles had to exist because if particles only were of positive energy, they would not be in what?