Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: Whose help Bennett sought to get Anna and Karl out of England? Title: Night Train to Munich Movie plot: As German forces take over Czechoslovakia in March 1939, Axel Bomasch (James Harcourt), a Czechoslovak scientist working on a new type of armour-plating, is flown to Britain. Bomasch's daughter, Anna (Margaret Lockwood), is arrested before she can reach the airport and sent to a concentration camp, where she is interrogated by Nazis who are after her father. Anna refuses to cooperate. Soon she is befriended by a fellow prisoner named Karl Marsen (Paul Henreid), who says he is a teacher imprisoned for his political views. Together they are able to escape and make their way to London. Anna does not know that Marsen is in fact a Gestapo agent assigned to gain her trust and locate her father. Following Marsen's suggestion, Anna places a cryptic newspaper advertisement to let her father know she is in the country. Soon after, she gets an anonymous phone call with instructions to go to the town of Brightbourne. There, Anna contacts Dickie Randall (Rex Harrison), a British intelligence officer working undercover as an entertainer named Gus Bennett. Randall takes Anna to her father, who is now working for the Royal Navy at the Dartford naval base. Anna argues with Randall over her attempt to post a letter to Marsen (with an informative postmark). It does not matter, as Dr. John Fredericks (Felix Aylmer), Marsen's undercover superior in London, had tailed her to Brightbourne. Soon after, Marsen arranges the kidnapping of Anna and her father, and brings them back to Germany by U-boat. Their captors threaten to put her in a concentration camp if Bomasch refuses to work for the Nazis. Meanwhile, Randall's proposal to rescue the Bomasches is (unofficially) accepted. He travels to Berlin and infiltrates the building where the Bomasches are being held, posing as Major Ulrich Herzog of the Corps of Engineers. He dupes Captain Prada and Admiral Hassinger into believing he was Anna's lover years ago and can persuade her to get her father to co-operate. Randall spends the night with Anna in her hotel room to maintain the...
The answer to this question is:
Can't answer