Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: Who took revenge? Title: My Name is Ivan Movie plot: As the film opens, a 12-year-old boy is running through an open field laughing and strolling in a carefree manner. As he runs around, he encounters his mother and informs her that there is a cuckoo in a tree. The boy, Ivan Bondarev (Nikolay Burlyaev) suddenly wakes up, revealing that the previous scene was a dream. He currently spends his nights in a windmill and leaves the building to explore. The windmill is in the middle of an open field with abandoned farm equipment with smoke swirling around. Next, the boy is wading through marshes and tall grasses as the sun is setting. While he wades through, flares are sent up and he encounters barbed wire. The film cuts to the title screen.A Russian officer wakes up Comrade Senior Lieutenant Galtsev (Yevgeni Zharikov) in the middle of the night because they found a boy crossing the Dnepr River. Ivan, wet and shivering, asks the informer to leave and declares himself Bondarev, asking for Number 51 at headquarters. Galtsev makes the first call and is ridiculed by the man on the phone. When he informs Bondarev that he will need to be locked up, Ivan insists that he calls again and even provides Galtsev with the code address of VCH 49550. When Galtsev gets through Number 51, he is instructed to provide the Ivan with paper and a pen and send him anything that the boy writes down. Galtsev realizes the importance of the boy and follows the orders in addition to providing the boy with food and a bath. Ivan counts pine needs and seeds, displaying a code and seals the envelope for it to be delivered. After, Ivan takes a bath and eats his food before falling asleep.As the sound of water drips in the barrack, Ivan dreams of his mother and himself dropping a feather into a well. During this dream, his mother and he speak of a star that remains in the well. Later, Ivan is in the well reaching for the allusive star as his mother is shot, presumably by German soldiers. Ivan awakes to see that Galtsev is still in the room. Ivan admits to becoming jittery and inquires whether he talks...
Ivan