Question: In what city were the Los Titanes band founded and is also the fourth most populous city in Columbia?

Context paragraphs:
Oxnard, California: Oxnard is a city in the United States, located along the coast of Southern California.  It is the 19th most populous city in California and the most populous in Ventura County.  The city lies approximately 60 miles west of downtown Los Angeles and is part of the larger Greater Los Angeles area.  The population of Oxnard is 203,585 as of the 2012 Financial Report.  Oxnard is the most populous city in the Oxnard-Thousand Oaks-Ventura, CA Metropolitan Statistical Area, which is listed as one of the wealthiest areas in America, with its residents making well above the average national income.

Los Titanes: Los Titanes are a Colombian salsa music band.  The group was founded in Barranquilla in 1981 by the trombonist Alberto Barros.

Los Angeles: Los Angeles ( ; Spanish for "The Angels"; ] ), officially the City of Los Angeles and often known by its initials L.A., is the cultural, financial, and commercial center of Southern California.  With a U.S. Census-estimated 2016 population of 3,976,322, it is the second most populous city in the United States (after New York City) and the most populous city in the state of California.  Located in a large coastal basin surrounded on three sides by mountains reaching up to and over 10000 ft , Los Angeles covers an area of about 469 sqmi .  The city is also the seat of Los Angeles County, the most populated county in the country.  Los Angeles is the center of the Los Angeles metropolitan area, with 13,131,431 residents, and is part of the larger designated Los Angeles-Long Beach combined statistical area (CSA), the second most populous in the nation with a 2015 estimated population of 18.7 million.

Wayne County, Michigan: Wayne County is the most populous county in the U.S. state of Michigan.  As of the 2016 census, its population was 1,749,366 making it the 19th-most populous county in the United States.  The 2014 Census update listed the county's population at 2,264,804.  The county seat is Detroit, the most populous city in Michigan and 18th-most populous city in the United States.  The county was founded in 1796 and organized in 1815.

Barranquilla: Barranquilla (] ) is a city and municipality located in northern Colombia.  It is the only major city in South America that was populated before its formal foundation.  Barranquilla is located near the Caribbean Sea.  The city is located in the Atlántico Department, of which it is the capital.  Barranquilla is the largest city and port in the northern Caribbean Coast region of Colombia, with a population of 2,370,753 as of 2011 in its metropolitan area, which makes it Colombia's fourth most populous city after Bogotá, Medellín and Cali.

Riverside, California: Riverside is a city in Riverside County, California, United States, located in the Inland Empire metropolitan area.  Riverside is the county seat of the eponymous county and named for its location beside the Santa Ana River.  It is the most populous city in the Inland Empire and in Riverside County, and is located about 60 mi east of Los Angeles.  It is also part of the Greater Los Angeles area.  Riverside is the 59th most populous city in the United States and 12th most populous city in California.  As of the 2010 Census, Riverside had a population of 303,871.

Guarulhos: Guarulhos (] ) is a Brazilian municipality.  It is the second most populous city in the Brazilian state of São Paulo, the 13th most populous city in Brazil, and is also the most populous city in the country that is not a state capital.  In the last few years it has outgrown Campinas.  It is part of the Metropolitan Region of São Paulo.  The population is 1,324,781 (2015 est.) in an area of 318.68 km².  It is the most populous non-capital city in the country and has the second-largest GDP in the state, the 8th largest in the country.

Karachi: Karachi (Urdu: ‎ ; ALA-LC: "Karācī" , ] ; Sindhi: ڪراچي‎ ) is the capital of the Pakistani province of Sindh.  It is the most populous city in Pakistan, sixth most populous city proper in the world and the 8th most populous metropolitan city in the world.  Ranked as a beta world city, the city is Pakistan's premier industrial and financial centre.  Karachi is also Pakistan's most cosmopolitan city.  Situated on the Arabian Sea, Karachi serves as a transport hub, and is home to two of Pakistan's two largest seaports, the Port of Karachi and Port Bin Qasim, as well as the busiest airport in Pakistan.

Toronto: Toronto ( , ] ) is the most populous city in Canada and the provincial capital of Ontario.  With a population in 2016 of 2,731,571, it is the fourth most populous city in North America after Mexico City, New York City, and Los Angeles.  Toronto is the centre of the Greater Toronto Area (GTA), the most populous metropolitan area in Canada, and anchors the Golden Horseshoe, an urbanized region that is home to 9.2 million people, or over 26% of the population of Canada.  A global city, Toronto is an international centre of business, finance, arts, and culture.

California: California ( , ) is the most populous state in the United States and the third most extensive by area.  Located on the Pacific coast, California shares borders with Oregon to the north, Nevada and Arizona to the east, and the Mexican state of Baja California to the south.  The state capital is Sacramento.  Los Angeles is California's most populous city, and the country's second largest after New York City.  The Greater Los Angeles Area and the San Francisco Bay Area are the nation's second- and fifth-most populous urban regions, respectively.  California also has the nation's most populous county, Los Angeles County, and its largest county by area, San Bernardino County.

Supporting paragraphs: Los Titanes Barranquilla
Answer: Barranquilla