Question: At which airport is the airline, which plans to scheduled service to Kahama soon, based?

Context paragraphs:
Fjellfly: Fjellfly (literally "Mountain Fly") was a Norwegian airline which operated between 1954 and 1972.  The airline was based at Skien Airport, Geiteryggen and diverse range of general aviation activities and a limited scheduled services.  Major undertakings included deliveries of the newspaper "Dagbladet", flying tourists into mountainous areas such as Hardangervidda and crop dusted forest areas.  A scheduled service was introduced from Skien to Oslo Airport, Fornebu in 1963, and extended to Sandefjord Airport, Torp and Hamar Airport, Stafsberg four years later.  At its peak in 1965, the airline had a fleet of fourteen aircraft.

Mayflower Airlines: Mayflower Airlines was a small regional airline in the United States that operated out of two airports, the East Boston Airport (now known as Logan International Airport) in 1936, and the New Bedford Airport.  Flights were in Ford Tri-Motor "Clippers" and covered Cape Cod (Hyannis, Provincetown) and the Islands (Nantucket and Martha's Vineyard).  Service was also provided to Springfield, Massachusetts, as well, with fares that ranged from $5.00 to $8.00.  Daily scheduled service was provided from Boston and New Bedford.  Providence R.I. is also listed as a departure point to the Islands without scheduled service.  The company was absorbed by NorthEast Airlines in 1945.  Timetables for the airline still exist and list destinations and fares.

Bergen Air Transport: Bergen Air Transport AS is an airline based at Bergen Airport, Flesland in Norway.  In addition to charter aviation and an aviation workshop, it offers a scheduled service between Bergen and Notodden Airport, Tuven.  The airline operates two Beechcraft B200 King Air aircraft and one Cessna Citation CJ2.  The airline was established in 1998, offering seaplane charter flights using Cessna 421 aircraft.  The service to Notodden started in 2000; a Cessna 441 was acquired in 2003, and from 2006 the company has used two Beechcraft.  The company is owned by Geir Hellsten and Håkon Lie-Nielsen.

Kahama Airstrip: The Kahama Airstrip is an airstrip operated by Buzwagi Gold Mine.  The airport is located in Kahama in the Shinyanga Region.  The airport is currently used for mine operations and is used by charter companies, however, Precision Air plans to begin scheduled service to Kahama soon.

Precision Air: Precision Air Services Plc (operating as Precision Air; DSE:PAL) is a Tanzanian airline based at Julius Nyerere International Airport in Dar es Salaam, with a minihub at Mwanza Airport.  The airline operates scheduled passenger services to Nairobi and airports in Tanzania.

Swift Current Airport: Swift Current Airport (IATA: YYN, ICAO: CYYN) is located 4 NM east of Swift Current, Saskatchewan, Canada.  This airport had scheduled service throughout the 1950s and '60s.  At the moment (2006), it has no scheduled service, but plans for expansion have recently been accepted.  In its current state, the largest aircraft it could accommodate would be a Boeing 737, but it would not be a comfortable fit.  It would be possible in an emergency, but not the most common plan.

ATA Airlines: ATA Airlines, Inc. – formerly known as American Trans Air and commonly referred to as ATA – was an American low-cost scheduled service and charter airline based in Indianapolis, Indiana.  ATA operated scheduled passenger flights throughout the U.S. mainland and Hawaii and San Juan, Puerto Rico, as well as military and commercial charter flights around the world.  ATA also operated flights to Portugal (LIS, OPO, TER, PDL and SMA).  In its early days the airline did charters throughout the World and had bases in Chicago, Detroit, New York, Indianapolis, Oakland and Milwaukee.  Later when they entered scheduled service the airlines maintained focus cities at Chicago Midway International Airport, Honolulu International Airport, and Oakland International Airport.

Jack Brooks Regional Airport: Jack Brooks Regional Airport (IATA: BPT, ICAO: KBPT, FAA LID: BPT) , formerly Southeast Texas Regional Airport, is near Port Arthur, Texas, nine miles (14 km) southeast of Beaumont and northeast of Port Arthur.  It was formerly the Jefferson County Airport, but its name was changed to honor former U.S. Representative Jack Brooks (D - Beaumont).  The airport is southwest of the city of Nederland in unincorporated Jefferson County, and is used for general aviation.  Southwest Airlines ended scheduled service (in 1980).  A number of other airlines have also initiated and then ceased service including American Eagle, Continental, Delta/Delta Connection and United Express.  The latest chapter with regard to passenger airline service at the airport involves the resumption of service by American Eagle on behalf of American Airlines to Dallas/Ft.  Worth (DFW).

DuBois Regional Airport: DuBois Regional Airport (IATA: DUJ, ICAO: KDUJ, FAA LID: DUJ) , formerly known as DuBois–Jefferson County Airport, is a public use airport in Jefferson County, Pennsylvania, United States.  It is located seven nautical miles (13 km) northwest of the central business district of Dubois, a city in Clearfield County.  The airport is on Pennsylvania Route 830 in Washington Township.  It is owned and operated by the Clearfield-Jefferson Counties Regional Airport Authority, based at the airport.  It is mostly used for general aviation, but has scheduled service on one airline, Southern Airways Expressway.  Service is subsidized by the Essential Air Service program.

Champion Air: Champion Air was an airline based in Bloomington, Minnesota, USA.  It operated general charter services to sports teams, vacation wholesalers and government agencies.  It also offered limited scheduled service.  Its main base was Minneapolis-Saint Paul International Airport, with hubs at Denver International Airport, Dallas-Fort Worth International Airport, Detroit Metropolitan Wayne County Airport, McCarran International Airport in Las Vegas, Lambert-St.  Louis International Airport, and Will Rogers World Airport in Oklahoma City.  The airline ceased all operations on May 31, 2008.  Until its shutdown, the airline was a prime contractor for the Justice Prisoner and Alien Transportation System.

Supporting paragraphs: Kahama Airstrip Precision Air
Answer: Julius Nyerere International Airport