Given the task definition, example input & output, solve the new input case.
In this task, you will be shown an extract from a movie plot. You need to read the extract and create questions that can be answered from the extract. The questions should be well-formed and grammatically correct. The questions should be completely answerable from the given passage and should not require any external knowledge. Subjective questions are not allowed. Create questions that result in factoid answers. A simple rule of thumb to decide whether a question is factoid or not is to see if two different people with average reading/comprehension skills would come up with the same answer after reading the passage.
Example: Twenty-year-old Will Hunting of South Boston is a self-taught, genius-level intellect, though he works as a janitor at the Massachusetts Institute of Technology and spends his free time drinking with his friends, Chuckie (Ben Affleck), Billy (Cole Hauser) and Morgan (Casey Affleck). When Professor Gerald Lambeau (Stellan Skarsgard) posts a difficult mathematics problem as a challenge for his graduate students, Will solves the problem anonymously, stunning both the graduate students and Lambeau himself. As a challenge to the unknown genius, Lambeau posts an even more difficult problem. Lambeau chances upon Will solving the problem but Will flees the scene. That night at a bar, Will meets Skylar (Minnie Driver), a British student about to graduate from Harvard, who plans on attending medical school at Stanford and gives Will her phone number before leaving.
Output: How old is Will Hunting in the movie ?
This is a good question which has a factoid answer.

New input case for you: In contemporary Russia young brothers Ivan and Andrey have grown a deep attachment to each other to make up for their fatherless childhood. Running home after a fight with neighborhood kids the boys are shocked to discover their father has returned after a twelve year absence. With their mother's uneasy blessing Ivan and Andrey set out on what they believe will be a fishing vacation with their taciturn father.Though at first ecstatic to be reunited with the father they've only known from a faded photograph, the boys strain under the weight of their dad's awkward and increasingly brutal efforts to make up for a missing decade of parental supervision. Ivan and Andrey find themselves alternately tested, scolded, scrutinized and ignored by their father through a changing series of encounters and hardships.As truck stops and cafes give way to rain-swept, primevally beautiful wildernesscoastline, Ivan's doubts about his father give way to open defiance. Andrey's powerful need to bond with a father he's never known begins, in turn, to distance him from Ivan.Ivan and his father's test of wills escalates into bitter hostility and sudden violence as the trio arrives at their mysterious island destination.The dubious sanctuary of a rickety light tower, the desperate reassurance of a stolen knife, the cryptic allure of a rusting strong box and the fleeting safety of a hastily patched boat give evidence to the ultimately tragic conclusion of Ivan and Andrey's harrowing father and son journey and the heartbreakingly transitory nature of their reunion.
Output:
After how long do the boys discovers their father has returned after?