Question: What is the name of the valley that the city 50 km northeast of The Estancia Maradona is located in?

Context articles: Ranica
Villa di Serio
Torre Boldone
Duitama
Bouaké
Estancia Maradona
San Juan, Argentina
Portobuffolé
Schilpario
Scanzorosciate

Ranica is a "comune" (municipality) in the Province of Bergamo in the Italian region of Lombardy, located about 50 km northeast of Milan and about 5 km northeast of Bergamo.
 As of 31 December 2004, it had a population of 5,984 and an area of 4.2 km2 .
Villa di Serio is a "comune" (municipality) in the Province of Bergamo in the Italian region of Lombardy, located about 50 km northeast of Milan and about 6 km northeast of Bergamo.
 As of 31 December 2004, it had a population of 6,118 and an area of 4.6 km2 .
Torre Boldone is a "comune" (municipality) in the Province of Bergamo in the Italian region of Lombardy, located about 50 km northeast of Milan and about 3 km northeast of Bergamo, at the entrance of the Valle Seriana.
 Part of Torre Boldone's territory is part of Parco dei Colli di Bergamo
Duitama (] ) is a city and municipality in the department of Boyacá.
 It is the capital of the Tundama Province.
 Duitama is located 240 km northeast of Bogotá, the capital city of Colombia and 50 km northeast of Tunja, the capital Boyacá.
 Duitama has existed since pre-Columbian times, when the Muisca inhabited the hills surrounding a former lake in the valley.
 The original name of Duitama was "Tundama", named after "cacique" Tundama.
 The elevation of the city is about 2590 m above sea level and the average temperature is 16 °C.
 Duitama is known as "The Pearl of Boyacá".
Bouaké (or Bwake) is the second-largest city in Ivory Coast, with a population of 536,189 (2014 census).
 It is the seat of three levels of subdivision—Vallée du Bandama District, Gbêkê Region, and Bouaké Department.
 The city is located in the central part of Ivory Coast about 50 km northeast of Lake Kossou, the country's largest lake.
 It is approximately 350 km north of Abidjan on the Abidjan-Niger Railway and about 100 km northeast of Yamoussoukro, the capital of the country.
The Estancia Maradona is a protected area in San Juan Province, Argentina, about 50 km southwest of San Juan, Argentina.
San Juan (] ) is the capital city of the Argentine province of San Juan in the Cuyo region, located in the Tulúm Valley, west of the San Juan River, at 650 m above mean sea level, with a population of around 112,000 as per the 2001 census (over 500,000 in the metropolitan area).
Portobuffolé (] ) or Portobuffolè ] (Venetian: "Portobufołè" ) is a "comune" (municipality) in the province of Treviso in the Italian region Veneto, located about 50 km northeast of Venice and about 30 km northeast of Treviso on both the shores of the Livenza river.
Schilpario is a "comune" (municipality) in the Province of Bergamo in the Italian region of Lombardy, located about 100 km northeast of Milan and about 50 km northeast of Bergamo.
 As of 31 December 2004, it had a population of 1,294 and an area of 63.8 km2 .
Scanzorosciate is a "comune" (municipality) in the Province of Bergamo in the Italian region of Lombardy, located about 50 km northeast of Milan and about 6 km northeast of Bergamo.
 As of 30 April 2013, it had a population of 10,018 and an area of 10.8 km2 .