In this task, you are given a context tweet and an answer. Your job is to generate a question for the given answer based on the given tweet paragraph. Note that your question should be answerable based on the given tweet, and the answer to your question should be the given answer.

Context: DRAKE AND RIHANNA ARE FILMING A MUSIC VIDEO IN OUR MALL RN— Chapstick Queen (@alexis16mariee) January 10, 2016 Answer: rhihanna and drake.
who is filming music video?

Context: PA Royal Photographer John Stillwell was invited to take the photographs of this happy family moment. Kensington Palace (@KensingtonRoyal) March 7, 2016 Answer: john stillwell.
what was the name of the photographer?

Context: Estonia is 1 of 5 NATO allies in Europe to meet its 2% def expenditures commitment. Fought, with no caveats, in NATO's sole Art 5 op. in Afg— toomas hendrik ilves (@IlvesToomas) July 21, 2016 Answer: five

how many nato allies in europe meet their defense expenditures commitment?