Definition: In this task, five ordered key facts are given. All the given facts are expressed in natural language. Your job is to generate a story 100 to 1000 words long, that includes all the facts given as input in their order of appearance while expanding upon them to produce a broader, yet coherent, narrative.
Input: Fact1: London is staid MI5 operative investigating Foreign Office official Samuel Fennan, Fact2: Dobbs becomes suspicious about cause of Fennan 's death while visiting Fennan 's widow after death, Fact3: Other government officials want Dobbs to drop case, Fact4: Ann is leaving him to go to Switzerland to join former World War II colleague, Fact5: Dieter Frey be using Ann to gain knowledge of Dobbs investigation

In 1960s London, Charles Dobbs James Mason is a staid MI5 operative investigating Foreign Office official Samuel Fennan, a former Communist who apparently commits suicide. Dobbs becomes suspicious about the cause of Fennans death while visiting Fennans widow the morning after his death. When a wakeup call is received at Fennans home, his widow Elsa Simone Signoret says the call was for her. Dobbs discovers this to be a lie, and as a result Dobbs suspects that Elsa, a survivor of a Nazi extermination camp, might have some clues regarding Fennans death. Other government officials want Dobbs to drop the case. However, Dobbs privately links up with retired police inspector Mendel Harry Andrews to continue inquiries. They uncover a network of Communist agents. Dobbs also discovers that his wife Ann Harriet Andersson is leaving him to go to Switzerland to join a former World War II colleague, Dieter Frey Maximilian Schell, who may be using Ann to gain knowledge of Dobbs investigation. Dobbs uses his knowledge of Dieter to set a trap that proves that Elsa is a spy and Dieter is her control. In a final confrontation, Dieter strangles Elsa and shoots Mendel, but he is killed bare handed by the enraged Dobbs.