Tommy Greenwald, born April 27, 1962, as of July 2016 age 55, is an American playwright and children’s book author.
 Greenwald co-wrote John & Jen with Andrew Lippa.
John & Jen (styled as john & jen) is a musical with music by Andrew Lippa, lyrics by Tom Greenwald, and a book by Lippa and Greenwald.
 It is a two-person show about the relationships first between a brother and sister, John and Jen, and then, after John is killed, between Jen and her son, also named John.
 The musical opened Off-Broadway in 1995 and was revived Off-Broadway in 2015.
A Little Princess, The Musical is a musical with music by Andrew Lippa and book and lyrics by Brian Crawley, based on the 1905 children's novel of the same name by Frances Hodgson Burnett.
The Addams Family is a musical comedy with music and lyrics by Andrew Lippa and the book by Marshall Brickman and Rick Elice.
 The show is based upon "The Addams Family" characters created by Charles Addams in his single-panel gag cartoons, which depict a ghoulish American family with an affinity for all things macabre.
 Although numerous film and television adaptations of Addams' cartoons exist, the musical is the first stage show based on the characters.
 "The Addams Family" is also the first show produced by Elephant Eye Theatricals.
Big Fish is a musical with music and lyrics by Andrew Lippa and a book by John August.
 It is based on Daniel Wallace’s 1998 novel, "", and the 2003 film "Big Fish" written by August and directed by Tim Burton.
Andrew Lippa (December 22, 1964) is an American composer, lyricist, book writer, performer, and producer.
 He is a resident artist at the Ars Nova Theater in New York City.
"When You're an Addams" is the opening number of "The Addams Family" musical.
 The music and lyrics are written by Andrew Lippa.
 The last lines are reprised in the curtain call.
"Little Known Facts" is a musical number in the Broadway musical comedy, "You're a Good Man, Charlie Brown".
 The music and lyrics were written by Clark Gesner in 1966.
 The song was in the original Off-Broadway production of the show in 1967 and was also in the revival production in 1999, where it was added an extra stanza by Andrew Lippa.
The Wild Party is a musical with a book by Michael John LaChiusa and George C. Wolfe and music and lyrics by LaChiusa.
 It is based on the 1928 Joseph Moncure March narrative poem of the same name.
 The Broadway production coincidentally opened during the same theatrical season (1999–2000) as an off-Broadway musical with the same title and source material.
The Wild Party is a musical with book, lyrics, and music by Andrew Lippa.

Question: What theatrical season did the musical with music by Andrew Lippa open?
Answer: 1999–2000