What do you think are the Golden Age triggers for each Civ?

[Lawrence of Arabia]

Hmmm

Greeks/Persians: scientific/Commerical
Colossus (+1 trade); Great Library (scientific); 5 libraries/5 marketplaces in your civ (unlikely but possible);

English: commerical/expansionist

Colossus, Magellans Expedition; 10 colonies (probably not)

Kinda tuff question. Can't be very sure. There tons of possiblities.