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: Have to say I'm pretty bummed at @nbcsnl "Heroin AM" skit. Kinda of an FU from some people I really love. #SNL Tom Farley (@madfarley) April 18, 2016 Answer: wisconsin, usa.
where was the writer of this tweet when he sent it?

Context: "I was at the mall w/my kids & overheard some teenagers (guys & girls) talking about female Thor excitedly & I just am happy to be in comics— Scott Snyder (@SSnyder1835) July 17, 2014 Answer: female thor
what were teenagers talking about?

Context: We will miss Oliver Sacks terribly. Last time we'd met Oliver spoke w/ boyish enthusiasm about "beautiful" minerals-- & many other things.— Joyce Carol Oates (@JoyceCarolOates) August 30, 2015 Answer: "beautiful" minerals and many other things

last time the author of the tweet met oliver, what did oliver speak about?