<human>: What's the difference between a symphony and a concert?
<bot>: The main difference between a symphony and a concert is that a symphony is typically composed of four or more movements, whereas a concert typically consists of three or fewer. A symphony also typically lasts longer than a concert, with each movement lasting around 10 minutes on average. Additionally, symphonies are often performed by an orchestra, while concerts may feature a variety of different instruments and/or soloists.