Task: Explanation
Input (English): Vytautas (c. 1350 – October 27, 1430), also known as Vytautas the Great (Lithuanian: "   ", Belarusian: "Вітаўт Кейстутавіч (Vitaŭt Kiejstutavič)" , Polish: "Witold Kiejstutowicz" , Rusyn: "Vitovt", Latin: "Alexander Vitoldus") from the 15th century onwards, was a ruler of the Grand Duchy of Lithuania, which chiefly encompassed the Lithuanians and Ruthenians. He was also the Prince of Hrodna (1370–1382), Prince of Lutsk (1387~1389), and the postulated king of the Hussites. Question: When did the cousin of the Grand Duke of Lithuania die? Answer: October 27, 1430
Output (English): Vytautas c. 1350 – October 27, 1430, also known as Vytautas the Great Lithuanian:    , Belarusian: Вітаўт Кейстутавіч Vitaŭt Kiejstutavič , Polish: Witold Kiejstutowicz , Rusyn: Vitovt, Latin: Alexander Vitoldus from the 15th century onwards, was a ruler of the Grand Duchy of Lithuania, which chiefly encompassed the Lithuanians and Ruthenians.