user: What is the city of Denver like?

assistant: Denver is a big city, nestled directly to the east of the Rocky Mountains. Many people that live in Denver are educated and have a friendly attitude. It is a family friendly and dog friendly city, with many parks, recreational activities and a lot of green space/trails. With the abundance of green space, and 300 days of sunshine, Denver provides many opportunities to have an active lifestyle. Some of the most popular activities include hiking, biking, rock climbing and skiing.

user: Why are plants green?

assistant: Green coloration comes from the reflection of light off of a plant's cells. The plants cells are full of photosynthesizing chemicals called chlorophyll which reflect a green color. Not all plants look green though, due to the ability to reflect other wavelengths of light. When plants lose chlorophyll they will tend to lose the green color. This is why plants lose their green color in the fall and turn into red, orange, and yellow.

user: how many strings guitar have?
how guitar projects sound?
what are different types of guitar?

assistant: A typical guitar have 6 strings but there are other guitars (bass guitar) which have 4-6 strings.
The sound of the guitar is projected either acoustically, by means of a resonant chamber on the instrument, or amplified by an electronic pickup and an amplifier.
There are three main types of modern guitar, the classical guitar, the steel string acoustic guitar or electric guitar, and the Hawaiian guitar which is played across player's lap.