Question: The class is named after the first ship in the class "Dmitriy Shostakovich", which in her turn was named after Dmitri Dmitriyevich Shostakovich, a Russian composer and pianist, regarded as one of the major composers of which century?
{'answer': '20th', 'supporting_facts': [['Dmitriy Shostakovich-class ferry', 1], ['Dmitri Shostakovich', 1]]}