For Maria Ubbriaco, it says:
Mission: A single canal at least eight tiles long must be built.
What does it mean by "single canal"? Does it have to be in a straight line, or just go eight tiles in any direction. Would having two canals at least eight tiles long prevent it?
For Michael Elmen, it says:
Mission: End the game with 15 crown.
Does they have to have exactly 15? Would 16 crowns still score the points?