Definition: In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Input: Passage: Since the release of Punk Goes Pop Vol. 7 the album has spawned four singles. The first which was released in promotion of the album was Dance Gavin Dance's cover of That's What I Like originally performed by Bruno Mars, it was released on June 1, 2017 alongside the announcement of the Punk Goes Pop Vol. 7, it was accompanied by a music video. The second single to be released off the album was The Amity Affliction's cover of Can't Feel My Face originally performed by The Weeknd, it was released on June 22, 2017. It was also accompanied by a music video depicting zombie teenagers walking around eating people in a school and a group of people trying to kill them. The band is seen playing on a stage in what seems to be an auditorium of the school and they also have become zombies. The third single to be released off the album was Andy Black and his wife Juliet Simms's cover of When We Were Young originally performed by Adele, it was released on July 14, 2017 in celebration of the release of Punk Goes Pop Vol. 7. It was also accompanied by a music video depicting Andy and his wife Juliet in a black and white movie singing a duet of When We Were Young. The fourth single to be released off the album was Grayscale's cover of Love Yourself originally performed by Justin Bieber, it was released on July 19, 2017 after the official release of Punk Goes Pop Vol. 7. The song's music video depicts teens singing in front of the band. As the band sings each of the audience members writes various flaws on each other's body with sticky notes. After that they are blown away by the lead singer of Grayscale with a leaf blower and the audience begins to dance around. At the end all the teens stick the notes to a wall creating a pattern of sorts. The meaning behind the video is to be yourself and don't let little things get to you and to love yourself for what you are not by what others think.
Link Information: The song was released as a promotional single on November 9, 2015 Question: How many years after the original was released was the cover of Justin Bieber's song released?
Output:
Answer: 2