Question: Palü Lake is below the mountain in what range of the Alps?

Context paragraphs:
Oberhalbstein Alps: The Oberhalbstein Alps (German: "Oberhalbsteiner Alpen" ) or Platta Group (Italian: "Alpi del Platta" ) are a mountain range in the Alps of eastern Switzerland and northern Italy.  They are considered to be part of the Central Eastern Alps.  The Oberhalbstein Alps are separated from the Lepontine Alps in the west by the Splügen Pass; from the Plessur Range in the north by the river Albula; from the Albula Alps in the east by the Septimer Pass and the river Gelgia; from the Bernina Range in the south by the Val Bregaglia.

Albula Alps: The Albula Alps are a mountain range in the Alps of eastern Switzerland.  They are considered to be part of the Central Eastern Alps, more specifically the Western Rhaetian Alps.  They are named after the river Albula.  The Albula Alps are separated from the Oberhalbstein Alps in the west by the Septimer Pass and the valley of the Sursés; from the Plessur Alps in the north-west by the Landwasser valley; from the Silvretta group in the north-east by the Flüela Pass; from the Bernina Range in the south-east by the Maloja Pass and the Inn valley (upper Engadine).

The White Hell of Pitz Palu: The White Hell of Pitz Palu (German: "Die weisse Hölle vom Piz Palü" ) is a 1929 German silent mountain film co-directed by Arnold Fanck and Georg Wilhelm Pabst and starring Leni Riefenstahl, Gustav Diessl, Ernst Petersen, and World War I flying ace Ernst Udet.  Written by Arnold Fanck and Ladislaus Vajda, the film is about a man who loses his wife in an avalanche while climbing the Piz Palü mountain, and spends the next few years searching the mountain alone for her body.  Four years later he meets a young couple who agree to accompany him on his next climb.  "The White Hell of Pitz Palu" was filmed on location in the Bernina Range in Graubünden, Switzerland.  The 1929 theatrical release starred Kurt Gerron, who was Jewish, as a night club guest.  The film was edited to remove scenes featuring Gerron, and it was rereleased as a 90-minute German-language sound film in 1935.  It was remade in 1950.

Grison Alps: The Grison Alps are the mountains of the Graubünden canton of Switzerland (Grisons being the English name for the Graubünden region).  There are many significant peaks in the Grison Alps, including the Tödi (3,614 m) and the highest peak, Piz Bernina (4,049 m).  Many of the mountain ranges feature extensive glaciers, such as at the Adula, the Albula, the Silvretta, the Bernnina or the Rätikon range.  The Grison Alps include parts of both the Eastern Alps and the Western Alps.  The Eastern Alps located in Graubünden are the Rhaetian Alps, which is part to the Central Eastern Alps.  The Rhaetian Alps consists of the following mountain ranges: Samnaun Alps, Rätikon, Silvretta, Sesvenna Range, Albula Range, Plessur Range, Oberhalbstein Range, Livigno Range, Bregaglia Range and the Bernina Range.  The Western Alps located in Graubünden, include portions of the Lepontine Alps and the Glarus Alps.

Uri Alps: The Uri Alps (German: "Urner Alps" ) are a mountain range in Central Switzerland and part of the Western Alps.  They extend into the cantons of Obwalden, Valais, Bern, Uri and Nidwalden and are bordered by the Bernese Alps (Grimsel Pass) and the Emmental Alps to the west (the four lakes: Lungerersee, Sarnersee, Wichelsee, and Alpnachersee), the Schwyzer Alps to the north (Lake Lucerne), the Lepontine Alps to the south (the valley of Urseren with Andermatt) and the Glarus Alps to the east (Reuss).

Bernina Range: The Bernina Range is a mountain range in the Alps of eastern Switzerland and northern Italy.  It is considered to be part of the Rhaetian Alps within the Central Eastern Alps.  It is one of the highest ranges of the Alps, covered with many glaciers.  Piz Bernina (4049 m ), its highest peak, is the most easterly four thousand-metre peak in the Alps.  The peak in the range which sees the most ascents is Piz Palü.

Plessur Alps: The Plessur Alps are a mountain range in the Alps of eastern Switzerland.  They are considered to be part of the Western Rhaetian Alps.  They are named after the river Plessur, which originates from the center of the ranges.  The Plessur Alps are separated from the Glarus Alps in the west by the Rhine valley; from the Rätikon range in the north by the Landquart river valley (Prättigau); from the Albula Alps in the south-east by the Landwasser river valley; from the Oberhalbstein Alps in the south by the Albula river valley.

Schwyz Alps: The Schwyz Alps (German: "Schwyzer Alpen" ) are a mountain range in Switzerland.  They form part of the North-Eastern Swiss Alps and are bordered by the Glarus Alps to the east, the Appenzell Alps to the north-east, the Emmental Alps in the west, and the Uri Alps to the south-west.  The Klausen Pass is the highest point between the Schwyz Alps and the Glarus Alps.

Palü Lake: Palü Lake (Romansh: "Lagh da Palü", German "Palüsee") is a lake below Piz Palü in the Grisons, Switzerland.  Water from Palü Glacier feeds into the lake.  In 1926, a dam was built enabling use of the lake as a reservoir.

Piz Palü: Piz Palü is a mountain in the Bernina Range of the Alps, located between Switzerland and Italy.  It is a large glaciated massif composed of three main summits, on a ridge running from west to east.  The main (and central) summit is 3,900 metres high and is located within the Swiss canton of Graubünden, although the border with the Italian region of Lombardy runs about 100 metres west of it at almost the same height (3,898 m).  The western summit (3,823 m; on the international border) is named "Piz Spinas" and is the only one not covered by ice.  The eastern summit (3,882 m; within Switzerland) is named "Piz Palü Orientale".  The name "Palü" derives from the Latin "palus", meaning a swamp, and the mountain is said to be named after the "Alpe Palü", a high alpine pasture some 4 km to its east.

Supporting paragraphs: Palü Lake Piz Palü
Answer: Bernina Range