TECHNICALLY the technique is supposed to be "ask questions (as the GM) and use the answers" where here the players clearly are rather familiar with each other and how they play, so they're just freewheeling it. From this point the GM probably WOULD start asking more specific questions, though PC creation (pick playbooks, allocate attributes, select starting equipment, special abilities, bonds, alignment, and race) would happen first, probably with some questioning to ascertain the significance of each choice and what it says about the setting. After that the GM will probably ask some questions that form the equivalent of a 'kicker', placing the PCs in a specific starting scene.