You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who played jack skellington in the nightmare before christmas?" whose answer is Chris Sarandon.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who played jack skellington in the nightmare before christmas
Useful Output:

Doc 1: Chris Sarandon voiced the main part and Danny Elfman did the singing. Both are fantastic.
Doc 2: SUBSCRIBE → https://goo.gl/rRQ5W7 Jack Skellington is voiced by Chris Sarandon, and Sally is voiced by Catherine O'Hara, who also sings for
Doc 3: The Voice of Jack Skellington Talks About Experience with TIM BURTON. 25K views · 2 years ago #nightmarebeforechristmas #insideofyou more
Doc 4: 'The Nightmare Before Christmas' turns 30! In this ET flashback, composer Danny Elfman explains how he created Jack Skellington's singing
Doc 5: Chris Sarandon as Jack Skellington  Jack, known as the "Pumpkin King" of Halloween Town, was brought to life by Sarandon for his speaking voice