Neutral Milk Hotel was an American indie rock band formed in Ruston, Louisiana by singer, guitarist, and songwriter Jeff Mangum in the late 1980s. The band is noted for its experimental sound, abstract lyrics and eclectic instrumentation. The first release under the Neutral Milk Hotel moniker was the 1994 EP Everything Is, a short collection of tracks featuring Mangum.

The band's second album, In the Aeroplane Over the Sea, released in 1998 and also produced by Robert Schneider, is notable as a critically acclaimed and widely popular album. It is largely inspired by the story of Holocaust victim Anne Frank. During live performances, including the one released under the title Live at Jittery Joe's, Mangum has described some of the songs of this album as based on urgent, recurring dreams he had of a Jewish family during World War II. The album was highly praised by critics for its wildly inventive instrumentation and Mangum's provocative and impassioned lyrics. Although it was met with scant response from the general public when it was released, the recording has continued to gain momentum in indie music circles, selling over 300,000 copies, according to Merge Records. However, the record (along with the year of constant touring that succeeded it) took its toll on Mangum. The band abruptly went on hiatus, turning down all requests for shows, including a support slot for R.E.M.  Before Neutral Milk Hotel began their indefinite hiatus, Mangum played live at a house show on December 5, 1998 in Athens on Chris Bilheimer's birthday. The bill was shared with Elf Power, and the audience was made up almost completely of friends and bandmates. Playing solo and acoustic, Mangum opened the set with what was to be the only post-Aeroplane composition to be performed in public, "Little Birds," a song about a boy whose body becomes filled with miniature birds that protect him from his murderous father. Mangum finished the rest of the evening with most of the Aeroplane songs, encouraging the audience to sing along in substitute for the horn parts. For the last several songs, Scott Spillane took his trumpet into an adjacent room and played his parts through the wall. A recording of the show circulated on the internet, but it has never been officially released, most likely due to the poor quality of the recording.  Mangum played another show on December 31, 1998, at which he performed the songs "Oh Sister," "Engine," and "In the Aeroplane Over the Sea," joined by Koster and Spillane.  In the Aeroplane Over the Sea has been cited by several as one of the greatest albums of all time.

Using a quote from the above article, answer the following question: Who was in the band at the time of release?
Robert Schneider,