Definition: This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
Input: Passage: Of the territories of Poland annexed by the Soviet Union between 1939 and 1940, the region around Biaystok and a minor part of Galicia east of the San river around Przemysl were returned to the Polish state at the end of World War II. Of all other territories annexed by the USSR in 193940, the ones detached from Finland (Karelia, Petsamo), Estonia (Ingrian area and Petseri County) and Latvia (Abrene) remained part of the Russian Federation, the successor state of the Soviet Union, after 1991. Northern Bukovina, Southern Bessarabia and Hertza remain part of Ukraine. Question: After World War II, what regions remain part of Ukraine?
Output:
Northern Bukovina, Southern Bessarabia and Hertza