user: Where is the Burg Lockenhaus located

assistant: Burg Lockenhaus (Hungarian Léka) is a castle and medieval fortress in the Guens Valley in the southeastern part of Lockenhaus, in Burgenland, eastern Austria. Burg Lockenhaus is 368 metres (1,207 ft) above sea level. The castle was built in Romanesque and Gothic architectural styles around 1200, and was initially called "Leuca" or Léka. It is part of the Naturpark Geschriebenstein.

user: Based on the reference text, provide a bulleted list of the three stages of ISO 27001 Certification and the activities of each stage.

assistant: The following are the three stages of ISO 27001 certification:
1. Stage 1: A preliminary, informal review of the Information Security Management System. Activities include checking for existence and completeness of primary documentation.
2. Stage 2: A detailed and formal audit performed by a third party to validate adequate implementation of the requirements specified in ISO 27001
3. Ongoing: Follow-up reviews and audits to confirm continued compliance with the requirements of ISO 27001.

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.