In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Let me give you an example: Passage: Nearing London, Oliver encounters Jack Dawkins, a pickpocket more commonly known by the nickname the "Artful Dodger", and his sidekick, a boy of a humorous nature named Charley Bates, but Oliver's innocent and trusting nature fails to see any dishonesty in their actions. The Dodger provides Oliver with a free meal and tells him of a gentleman in London who will "give him lodgings for nothing, and never ask for change". Grateful for the unexpected assistance, Oliver follows the Dodger to the "old gentleman's" residence. In this way Oliver unwittingly falls in with an infamous Jewish criminal known as Fagin, the gentleman of whom the Artful Dodger spoke. Ensnared, Oliver lives with Fagin and his gang of juvenile pickpockets in their lair at Saffron Hill for some time, unaware of their criminal occupations. He believes they make wallets and handkerchiefs.
The answer to this example can be: Who believes Fagin's gang make wallets and handkerchiefs?.
Here is why: This question is based on the following sentence in the passage "He believes they make wallets and handkerchiefs". It evaluates the understanding that the pronoun "he" refers to name "Oliver". You can ask questions like this one about most pronouns in a paragraph.

OK. solve this:
Passage: Santamental, released in October 2003, is a collaborative project featuring several prominent musicians such as guitarists Eddie Van Halen, Slash, Steve Vai, and drummer Gregg Bissonette. When Lukather's record company, Bop City Records, approached him about recording a Christmas album, he responded with a quip about his suitability for the project. The company wanted him to do the record knowing he would approach the project with a unique angle and produce something different from the typical Christmas album. Lukather recruited keyboardist Jeff Babko and guitarist Larry Carlton, who Lukather had worked with previously, to help arrange the songs. The project was a challenge to Lukather, who had to be creative to turn the traditionally simple songs into something interesting for listeners without altering the fundamental structures. He said of the album, "But I never dreamt in a million years that I'd do a Christmas record."The musicians Lukather chose for Santamental, most of whom were involved in the hard-rock genre, lent a heavy feel to the album. Van Halen recorded guitar tracks for "Joy to the World" after not having been in the studio for some time but immediately made an impression on Lukather with his level of playing. Vai provided guitar work for "Carol of the Bells" along with Lukather's son Trevor, then 14 years old. Slash, who recorded his part in one take, played on the Lukather/Stan Lynch composition "Broken Heart for Christmas". Lukather spoke highly of Slash after the project, calling him the "Keith Richards of our generation". Well-known session guitarist Michael Landau played on the song "Look Out For Angels", and there is a version of "Jingle Bells" featuring a big band and sung by Sammy Davis, Jr. Santamental was recorded in six days, after which Lukather proclaimed it "his first and last Christmas album".
Answer:
What is the first name of the person who recorded guitar tracks for "Joy to the World" after not having been in the studio for some time?