Question: After the period which limited the supply of shellac; Białystok, Przemyśl were returned to what country along with the region they had been given in the Treaty of Schönbrunn?

Knowledge 1: Napoleon
The resulting Treaty of Schönbrunn in October 1809 was the harshest that France had imposed on Austria in recent memory. Metternich and Archduke Charles had the preservation of the Habsburg Empire as their fundamental goal, and to this end they succeeded by making Napoleon seek more modest goals in return for promises of friendship between the two powers. Nevertheless, while most of the hereditary lands remained a part of the Habsburg realm, France received Carinthia, Carniola, and the Adriatic ports, while Galicia was given to the Poles and the Salzburg area of the Tyrol went to the Bavarians. Austria lost over three million subjects, about one-fifth of her total population, as a result of these territorial changes. Although fighting in Iberia continued, the War of the Fifth Coalition would be the last major conflict on the European continent for the next three years. [SEP] Knowledge 2: Molotov–Ribbentrop Pact
Of the territories of Poland annexed by the Soviet Union between 1939 and 1940, the region around Białystok and a minor part of Galicia east of the San river around Przemyśl were returned to the Polish state at the end of World War II. Of all other territories annexed by the USSR in 1939–40, 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. [SEP] Knowledge 3: Phonograph record
Vinyl's lower surface noise level than shellac was not forgotten, nor was its durability. In the late 1930s, radio commercials and pre-recorded radio programs being sent to disc jockeys started being stamped in vinyl, so they would not break in the mail. In the mid-1940s, special DJ copies of records started being made of vinyl also, for the same reason. These were all 78 rpm. During and after World War II, when shellac supplies were extremely limited, some 78 rpm records were pressed in vinyl instead of shellac, particularly the six-minute 12-inch (30 cm) 78 rpm records produced by V-Disc for distribution to United States troops in World War II. In the 1940s, radio transcriptions, which were usually on 16-inch records, but sometimes 12-inch, were always made of vinyl, but cut at 33 1⁄3 rpm. Shorter transcriptions were often cut at 78 rpm.
Knowledge 1: Molotov–Ribbentrop Pact
Of the territories of Poland annexed by the Soviet Union between 1939 and 1940, the region around Białystok and a minor part of Galicia east of the San river around Przemyśl were returned to the Polish state at the end of World War II. Of all other territories annexed by the USSR in 1939–40, 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. [SEP] Knowledge 2: Gmina Fredropol
Gmina Fredropol is a rural gmina (administrative district) in Przemyśl County, Subcarpathian Voivodeship, in south-eastern Poland, on the border with Ukraine. Its seat is the village of Fredropol, which lies approximately south of Przemyśl and south-east of the regional capital Rzeszów. [SEP] Knowledge 3: Napoleon
The resulting Treaty of Schönbrunn in October 1809 was the harshest that France had imposed on Austria in recent memory. Metternich and Archduke Charles had the preservation of the Habsburg Empire as their fundamental goal, and to this end they succeeded by making Napoleon seek more modest goals in return for promises of friendship between the two powers. Nevertheless, while most of the hereditary lands remained a part of the Habsburg realm, France received Carinthia, Carniola, and the Adriatic ports, while Galicia was given to the Poles and the Salzburg area of the Tyrol went to the Bavarians. Austria lost over three million subjects, about one-fifth of her total population, as a result of these territorial changes. Although fighting in Iberia continued, the War of the Fifth Coalition would be the last major conflict on the European continent for the next three years.
Knowledge 1: Napoleon
The resulting Treaty of Schönbrunn in October 1809 was the harshest that France had imposed on Austria in recent memory. Metternich and Archduke Charles had the preservation of the Habsburg Empire as their fundamental goal, and to this end they succeeded by making Napoleon seek more modest goals in return for promises of friendship between the two powers. Nevertheless, while most of the hereditary lands remained a part of the Habsburg realm, France received Carinthia, Carniola, and the Adriatic ports, while Galicia was given to the Poles and the Salzburg area of the Tyrol went to the Bavarians. Austria lost over three million subjects, about one-fifth of her total population, as a result of these territorial changes. Although fighting in Iberia continued, the War of the Fifth Coalition would be the last major conflict on the European continent for the next three years. [SEP] Knowledge 2: Molotov–Ribbentrop Pact
Of the territories of Poland annexed by the Soviet Union between 1939 and 1940, the region around Białystok and a minor part of Galicia east of the San river around Przemyśl were returned to the Polish state at the end of World War II. Of all other territories annexed by the USSR in 1939–40, 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. [SEP] Knowledge 3: Gmina Fredropol
Gmina Fredropol is a rural gmina (administrative district) in Przemyśl County, Subcarpathian Voivodeship, in south-eastern Poland, on the border with Ukraine. Its seat is the village of Fredropol, which lies approximately south of Przemyśl and south-east of the regional capital Rzeszów.

Answer: Polish state