user: What is 12-3-30?

assistant: 12-3-3- is the viral workout trend that's been popularized on social media. It entails walking on a treadmill at an incline of 12, a speed of 3 mph, for 30 minutes.

user: What is on the DVD Our Favorite Things

assistant: Our Favorite Things is a compilation DVD by the band Negativland, released on November 27, 2007. The original release date on October 23 was skipped due to a pressing error in the DVDs and the bonus CD, a collection of Negativland covers done by an a cappella doo-wop group. 

It contains 20 of the band's greatest "hits" animated by 20 different artists from all over the United States. The cover parodies the artwork of the film The Sound of Music as well as title of the film's song "My Favorite Things". The front features a "review" from the character Goofy saying, "It's goofy". The people on the cover are dolls.

user: Identify which instrument is string or percussion: Kebero, Vlier

assistant: Vlier is string, Kebero is percussion.