user: What is the style of play for Zlatan Ibrahimović?

assistant: Ibrahimović has been described as being "good in the air, quick, tall, strong and agile, he plays well with his back to goal and boasts some of the best finishing, vision, passing and ball control around. A versatile and well-rounded attacker, from a tactical standpoint, Ibrahimović is capable of playing anywhere along the front line, due to his ability to both create and score goals for his team, although he is most often deployed as a striker, due to his composure and eye for goal. He has also functioned in a more creative playmaking role at times, as a supporting forward or even as a number 10, in particular in his later career, after losing some of his pace and stamina with age; this deeper position allows him to drop into midfield to pick up the ball, where he can utilize his technical ability, vision, passing, and movement to create space and provide assists for teammates. While naturally right-footed, Ibrahimović is a powerful and accurate striker of the ball from both inside or outside the penalty area with either foot, and is also known for his accuracy from penalties and dead ball situations. An accurate finisher with his head as well as with his feet, his height, elevation, and strength often give him an advantage at winning aerial challenges, and also allow him to function as a "target man"; despite his large stature, Ibrahimović is uncommonly agile for a player of his size, and his athleticism and ability in the air have seen him score several goals from acrobatic strikes and volleys throughout his career, which earned him the moniker Ibracadabra in the Italian media. In spite of his size and physique, Ibrahimović possesses excellent technique and ball control, which, coupled with his balance, power, and physicality, enables him to hold up the ball well with his back to goal, retain possession, and link up with other players; he has also been praised by pundits for his creativity and dribbling skills. Although he is not gifted with exceptional pace, in particular over shorter distances, which became more evident in his later career as he slowed down with age, he is also a quick player and a fast sprinter, who possessed significant acceleration in his youth, and was able to clock top speeds over 30 km/h even into his 30s.

user: From the given text, write some important points about guitar's vibrato system

assistant: 1. A vibrato system is a mechanical component that alters the pitch of the strings on a guitar.
2. They modify the string tension at the bridge or tailpiece of an electric guitar using a regulating lever, sometimes known as a whammy bar, vibrato bar, or wrongly as a tremolo arm, to add vibrato to the music.
3. With the help of the lever, the musician can quickly and momentarily alter the tension and occasionally the length of the strings, which alters the pitch and produces effects such as vibrato, portamento, and pitch bend.
4. Vibrato-free instruments need different bridge and tailpiece systems.

user: What was the US civil war about?

assistant: The US civil war had a complex start but the main aim was the preservation of slavery for the confederacy and the elimination of slavery for the union. Slavery was the principal political issue between the parties. 
There was also an aspect of the confederacy wanting to secede from the Union to preserve slavery. The union did not want the slave stares to secede. After war broke out, it is interesting to note, no foreign government recognized the confederate government. 
By the mid 1800s, the US had two distinct regions: free states with fast growing economies based on family farming, manufacturing, mining, business and transporting goods. The slave states were based on a plantation system and the only fast growth was in texas. These states were largely rural with few large cities and little industry except in close proximity to free states.