Context: In June 2006, Steven Spielberg announced he would direct a scientifically accurate film about "a group of explorers who travel through a worm hole and into another dimension", from a treatment by Kip Thorne and producer Lynda Obst. In January 2007, screenwriter Jonathan Nolan met with them to discuss adapting Obst and Thorne's treatment into a narrative screenplay. The screenwriter suggested the addition of a "time element" to the treatment's basic idea, which was welcomed by Obst and Thorne. In March of that year, Paramount hired Nolan, as well as scientists from Caltech, forming a workshop to adapt the treatment under the title Interstellar. The following July, Kip Thorne said there was a push by people for him to portray himself in the film. Spielberg later abandoned Interstellar, which was eventually directed by Christopher Nolan.

Question: When did Spielberg announce what would become 'Interstellar'?
Answer: June 2006

Question: Who took over directing 'Interstellar'?
Answer: Christopher Nolan

Question: What was the concept for 'Interstellar'?
Answer: a group of explorers who travel through a worm hole and into another dimension

Question: Who wrote the 'Interstellar' script?
Answer: Jonathan Nolan

Question: What university provided scientific consultation for 'Interstellar'?
Answer: Caltech

Question: In what year did Kip Thorne and Lynda Obst do a treatment of Interstellar?
Answer: Unanswerable

Question: In what year did Lynda Obst become a producer?
Answer: Unanswerable

Question: In what year did Jonathan Nolan become a screenwriter?
Answer: Unanswerable

Question: In what year did Christopher Nolan become a director?
Answer: Unanswerable