Input question: What usual first step in the identification of a bacterial species is like a litmus test in that the results are identified by colors (blue/purple for positive and pink/red for negative)?

Output answer: gram staining

Input question: Live Aid featured a video of Bowie duetting with which rock star?

Output answer: mick jagger

Input question: Which capital city was supposedly founded by Yuri the log armed?

Output answer: moscow

Input question: Which fantasy novelist was knighted for his services to literature in 2009?

Output answer:
terry pratchet