Simplify the following text for a Grade 6 native English-speaking person.
Original: Shrek 2 is a 2004 American computer-animated comedy film , produced by DreamWorks Animation and directed by Andrew Adamson , Kelly Asbury and Conrad Vernon . It is the second installment in the Shrek film series and the sequel to 2001 's Shrek .
Simplified: Shrek 2 is a 2004 animated comedy film and is the second movie in the Shrek film series .