Frankfurter Fragen is a stand-alone extension to "Frankfurt - das Spiel zur Stadt"
It consists of 300 question cards with about 700 questions about Frankfurt trivia. They are printed on both sides, the front being blue with symbols consisting of a short question/answer and the back being red with a more detailed reply.
The front also has special questions and remarks for the original game which do not apply when playing the extension only.
There's 2 ways of playing
1) being the first to collect 10 cards
2) being the first to collect 5 cards with identical symbols on the front
The latter can take ages even if you have some die-hard locals around. It is published in German only as the target lies on natives and newly inhabitants who want to know more about their city.