user: Who built Sigiriya fortress in Sri Lanka?

assistant: King Kashyapa developed Sigiriya city and fortress.

user: How do you play chess?

assistant: Chess is a two-person board game, where the objective of the game is to capture your opponents King. The King is just one of sixteen pieces that each player can use during the game. The other fifteen pieces include: Eight pawns, two rooks, two knights, two bishops, and a queen. The pieces are placed on an eight by eight, square board in a fixed starting position. The game begins by the player using the white pieces moving one of their pieces to another square. Each player will then alternate playing one move turns. Each piece has a set of legal moves that it can perform. For example, a bishop can only move diagonally on squares of its same color, whereas rooks can only move vertically or horizontally. The goal of the game is to use your pieces in a strategic manner that ultimately leads to your opponent's King being captured. The most common way to achieve this is by using your pieces to capture your opponent's pieces that are defending the King, and then exploiting this weakness to attack the King. While it's important to play on the offensive, it's equally as important to understand your opponent's strategy, so that you can properly defend against their attempts to capture your own King.

user: What are the three branches of the US Federal Government?

assistant: The US Constitution divides the federal government into three branches: legislative, executive and judicial.  This ensures that no individual or group will have too much power.