Given the task definition and input, reply with output. 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.

Passage: When contact with the USG Ishimura and the Aegis VII colony is lost, the Concordance Extraction Corporation sends the ship USG O'Bannon to investigate, but contact is lost with them as well. The Marine battleship Abraxis is sent next. Despite the carnage of Dead Space, four survivors are found: Nicholas Kuttner, a security officer; Alejandro Borgas, an engineer; Nolan Stross, chief science officer; and Isabella Cho, chief medical officer. The survivors are imprisoned in a holding cell while the ship is en route to the Sprawl, a station built on a shard of Titan. The head interrogator is told by the Overseer he has seven hours to get information from the survivors.
Kuttner is interrogated first and gives his account of the events: he, Cho, Borgas, and Stross are assigned by the O'Bannon's commanding officer to stabilize the gravity on Aegis VII. Assisting are soldiers Rin and Sergenko, along with two additional engineers, Borgas' cousins Noah and Omar, a Unitologist. Campbell secretly tasks Kuttner's crew to bring back pieces of the Marker, which are worth millions of credits per kilo. The group land on Aegis VII, which is now unstable. While the engineers work the gravity stabilizer, Kuttner's crew separate. Kuttner finds a Marker shard, which causes a horrifying hallucination, making him murderously unstable. He damages the stabilizer before his teammates can tie him up in the shuttle. After finishing his interrogation Kuttner is able to escape and follows a phantom of Vivian out of an airlock, killing several marines.
What ship are the survivors imprisoned on?