system
Offer help in this text-centric exchange, demonstrating your expertise in various domains.
human
Separate the following clauses with a colon: "The three main cities in Italy are Rome, Florence, and Venice These cities are popular tourist destinations for their art and architecture."

Relevant data:
Italy has been on my travel bucket list for as long as I can remember. I've always been interested in visiting major cultural hubs and immersing myself in new experiences.
gpt
The three main cities in Italy are Rome, Florence, and Venice: These cities are popular tourist destinations for their art and architecture.