Question: What is the town called alone the river Kitzbuhler ache in in Tyrol where Christoph Wahrstotter was born.

Context paragraphs:
Leukental: The Leukental is a valley in North Tyrol in the district of Kitzbühel in Austria.  The Leukental runs north to south from the Thurn Pass to the Bavarian border, but is not just defined as the main valley but includes several smaller side valleys.  The river flowing through the Leukental is known as the "Jochberger Ache" from its source at the Thurn Pass to Kitzbühel, then as the "Kitzbühler Ache" from Kitzbühel to St. Johann in Tirol and, from its confluence with the "Fieberbrunner Ache" near St. Johann in Tirol, as the "Großache".  After leaving the Leukentals and Tyrol the river is known in Bavaria as the "Tiroler Ache" until it discharges into the Chiemsee lake, and its valley is known as the Achental.  The parishes in the Leukental are: Jochberg, Aurach bei Kitzbühel, Kitzbühel, Oberndorf in Tirol, St. Johann in Tirol, Kirchdorf and Kössen.

Boundary, Washington: Boundary is a ghost town located in Stevens County, Washington, United States.  The town was located near the Canada–US border and near the Columbia River.  Boundary's peak years were during the 1890s.  The population was around 900.  The town started off as a railroad camp.  When the railroad finally spanned the wild Pend Oreille with a bridge, the railroad workers quickly moved on leaving the town of Boundary deserted.  The town contained the Boundary Hotel, post office, and general store.  A town called "New Boundary" came into being south of the original townsite and the old town eventually vanished.

Ötztal: The Ötztal is an alpine valley located in Tyrol, Austria.  The Ötztaler Ache river flows through the valley in a northern direction.  The Ötztal separates the Stubai Alps in the east from the Ötztal Alps in the west.  The valley is 65 km (40 mi) long.  The northern end of the valley is at the confluence of the Ötztaler Ache and Inn rivers, 8 km east of Imst and 50 km west of Innsbruck.  The only railway station of the valley, Ötztal railway station, is located here and connects the Ötztal with the Arlberg railway (Innsbruck-Bludenz) and also a motorway interchange to the A12 (E60).

Christoph Wahrstötter: Christoph Wahrstötter (born 10 October 1989) is an Austrian freestyle skier.  He was born in Kitzbühel.  He competed in ski cross at the World Ski Championships in 2013 (where he failed to qualify missing out by only 0.17 seconds) and 2017 (where he placed 5th), and at the 2014 Winter Olympics in Sochi, in ski-cross.

Kitzbühel: Kitzbühel (] ) is a small medieval town situated along the river Kitzbuhler Ache in Tyrol, Austria and the administrative centre of the Kitzbühel district ("Bezirk").  It has a population of 8,134 (as of 1 January 2013).  The town is situated in the Kitzbühel Alps about 100 km east of the state capital of Innsbruck.  It is a ski resort of international renown.

Brixentaler Ache: The Brixentaler Ache is a right tributary of the River Inn in Austria.  It is located in the state of Tyrol and passes through the districts of Kitzbühel and Kufstein.  The Brixentaler Ache ist one of the biggest tributaries of the Inn in the Tyrolean Unterland by catchment area (330.3 km²), but she is only 28 km long.

Kitzbüheler Ache: The Kitzbühler Ache is a river in the Kitzbühel district, Tyrol, Austria.  As Jochberger Ache it sources near Pass Thurn.

A Town Called Bastard: A Town Called Bastard (also known as A Town Called Hell on DVD and blu-ray) is a 1971 British/Spanish international co-production spaghetti Western.  The story concerns a vengeful widow (Stella Stevens) who returns to a small town presided over by a priest (Robert Shaw) and a sadistic Mexican outlaw (Telly Savalas).  Violence erupts when a brutal army Colonel (Martin Landau) arrives in search of an elusive rebel leader.  The film was retitled "A Town Called Hell" for US release as the word "bastard" was thought offensive. -

Niagara River: The Niagara River ( ) is a river that flows north from Lake Erie to Lake Ontario.  It forms part of the border between the province of Ontario in Canada (on the west) and the state of New York in the United States (on the east).  There are differing theories as to the origin of the river's name.  According to Iroquoian scholar Bruce Trigger, "Niagara" is derived from the name given to a branch of the locally residing native Neutral Confederacy, who are described as being called the "Niagagarega" people on several late-17th-century French maps of the area.  According to George R. Stewart, it comes from the name of an Iroquois town called "Ongniaahra", meaning "point of land cut in two".

United States Boundary Commissioner: Article V of the TREATY OF PEACE, FRIENDSHIP, LIMITS, AND SETTLEMENT BETWEEN THE UNITED STATES OF AMERICA AND THE UNITED MEXICAN STATES CONCLUDED AT GUADALUPE HIDALGO (known commonly as the Treaty of Guadalupe Hidalgo ) declared that the new boundary between the two republics of the United States and Mexico would lay "three leagues from land, opposite the mouth of the Rio Grande, otherwise called Rio Bravo del Norte, or Opposite the mouth of its deepest branch, if it should have more than one branch emptying directly into the sea; from thence up the middle of that river, following the deepest channel, where it has more than one, to the point where it strikes the southern boundary of New Mexico; thence, westwardly, along the whole southern boundary of New Mexico (which runs north of the town called Paso) to its western termination; thence, northward, along the western line of New Mexico, until it intersects the first branch of the river Gila; (or if it should not intersect any branch of that river, then to the point on the said line nearest to such branch, and thence in a direct line to the same); thence down the middle of the said branch and of the said river, until it empties into the Rio Colorado; thence across the Rio Colorado, following the division line between Upper and Lower California, to the Pacific Ocean. "  It delineated the boundary through its text but wasn't written with much knowledge of the area's actually geography; A commissioner and surveyor from each country were appointed to precisely locate landmarks and accurately map the new border, relying on the treaty as their guide.

Supporting paragraphs: Christoph Wahrstötter Kitzbühel
Answer: He was born in Kitzbühel.