Given the task definition, example input & output, solve the new input case.
In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.
Example: Tracy slept awkwardly on their new bed and was having some pain, so Tracy cracked her neck.
Question: What did Tracy do with her neck?
Output: crack her neck
The output phrase perfectly answers the question and is explicitly mentioned in the passage as well.

New input case for you: The Mystery of a Hansom Cab takes place in Melbourne, Australia and involves an investigation into a homicide, after a corpse is discovered in the evening, in a hansom cab. The city of Melbourne plays a significant role in the plot and, as the author describes: "Over all the great city hung a cloud of smoke like a pall." The killer's identity is not as significant a revelation in the story as are the roles of the influential and secretive Frettlby family, and their secret: they have an illegitimate daughter living on the streets. The class divide between Melbourne's wealthy and less fortunate is addressed throughout the plot. The protagonist in the novel is a policeman named Detective Gorby, who is given the task of solving the murder. As Hume describes the character's investigative skills: "He looked keenly round the room, and his estimate of the dead man's character was formed at once." The author commented in a later introduction, "All of the scenes in the book, especially the slums, are described from personal observation; and I passed a great many nights in Little Bourke Street, gathering material". At this time, the street had gained notoriety as a place frequented by prostitutes and criminals.
Question: What have the streets in Melbourne gained notoreity for?
Output:
For being frequented by prostitutes and criminals.