Fiddlin Nero
Prince
Surely if you have the internet and an SGL and Shakes hasnt been built and you have free artistry, you can get 10cpt on your first turn.
I imagine that happens pretty rarely
A cultural expansion in two turns is easy to acheive if you have education and lots of money and/or units to disband, library first turn 3cpt, uni second turn 3 + 4cpt, it helps in cost if you are scientific.
Looks like a 3rd turn expansion. Don't know what Education has to do with it?