Title: Left coronary artery
Content:  The left coronary artery typically runs for 10 to 25 mm, and then bifurcates into the anterior interventricular artery (also called the left anterior descending (LAD) and the Widow maker) and the left circumflex artery (LCx). Sometimes, an additional artery arises at the bifurcation of the left main artery, forming a trifurcation; this extra artery is called the ramus or intermediate artery. The part that is between the aorta and the bifurcation only is known as the left main artery (LM), while the term "LCA" might refer to just the left main, or to the left main and all its eventual branches. A "first septal branch" is sometimes described.
Title: Decatur Boulevard
Content:  Decatur Boulevard is a major north–south section line arterial in the Las Vegas metropolitan area located on the west side of the city.
Title: Artesia Boulevard
Content:  Artesia Boulevard is a west-east thoroughfare in Los Angeles County and Orange County.
Title: Durango Drive
Content:  Durango Drive is a major north-south road in the Las Vegas metropolitan area, Nevada, United States, located on the west side of the city.
Title: Arroyo Seco (Los Angeles County)
Content:  and storm water in Pasadena, the other being Eaton Wash on the eastern side of the city, which is a tributary of the Rio Hondo watershed. The Arroyo Seco then passes under the Ventura Freeway and the Colorado Street Bridge, and it crosses the Raymond Fault at the southern boundary of Pasadena at the San Rafael Hills. The channel continues along the western boundary of South Pasadena, then into northeast Los Angeles flowing southeast of the Verdugo Mountains and Mount Washington. The Arroyo Seco then proceeds through the Los Angeles neighborhoods of Highland Park, Hermon, Montecito Heights, and Cypress Park. It ends at the confluence with the Los Angeles River near Elysian Park, north of Dodger Stadium and Downtown Los Angeles. The Arroyo Seco Parkway, or Pasadena Freeway, runs parallel to the channelized Arroyo Seco from South Pasadena to the Los Angeles River.
Title: West Santa Ana Branch
Content:   The West Santa Ana Branch is a rail right-of-way formerly used by the Pacific Electric's (PE) Santa Ana route in Los Angeles County and Orange County in Southern California. The Los Angeles County Metropolitan Transportation Authority (Metro) owns the segment of the right-of-way in Los Angeles County, and the Orange County Transportation Authority (OCTA) owns the segment in Orange County. The line runs from the Watts Towers in the city of Los Angeles, southeast to the intersection of 4th Street and Santa Ana Boulevard in downtown Santa Ana. A 2 mi portion of it is occupied by Interstate 105 and the C Line. The right-of-way runs nearly straight on a diagonal between the two cities, in contrast to the cardinal grid of Orange County.
Title: California State Route 91
Content:  The Artesia Freeway is a freeway in southeastern Los Angeles County and northwestern Orange County. It runs east–west from its western terminus at the Long Beach Freeway in northern Long Beach to its eastern terminus at the Santa Ana Freeway in Buena Park. (SR 91 continues west of the Long Beach Freeway as the Gardena Freeway, and east of the Santa Ana Freeway as the Riverside Freeway.) The "Artesia Freeway" name originally was assigned to the entire length of SR 91 west of the Santa Ana Freeway in the early 1970s since it was, in sense, the freeway realignment of SR 91 from the paralleling Artesia Boulevard. During the 1984 Summer Olympics, a 25 km stretch of the highway was home to the cycling men's road team time trial event. As the only freeway to link Los Angeles, Orange, and Riverside counties, SR 91 is one of the most heavily congested routes in Southern California.
Title: West Santa Ana Branch Transit Corridor
Content:  The West Santa Ana Branch Transit Corridor is a planned light rail line, mostly following the Pacific Electric's historic West Santa Ana Branch, connecting Downtown Los Angeles to the City of Artesia and other cities in southeastern Los Angeles County.
Title: Brookside, Los Angeles
Content:  Located in Mid-Wilshire, Brookside is located between Olympic Boulevard and Wilshire Boulevard, and includes the homes on both sides of, and between, Highland Ave. and Muirfield Ave. A natural stream, the Arroyo de los Jardines (Brook of the Gardens), runs through Brookside and onto Baldwin Hills and eventually flows into Ballona Creek. The Park Mile commercial corridor separates Brookside from Hancock Park to the north.
Title: South Pasadena, California
Content:  The Arroyo Seco (canyon, stream, and cultural landscape) offers a diverse range of experiences for walkers and more experienced hikers. The Arroyo Seco stream begins at Red Box near Mount Wilson in the San Gabriel Mountains and proceeds through steep mountain canyons for 11 mi until it enters the urban plain of Southern California at the Jet Propulsion Laboratory. The stream, largely channelized south of Devil's Gate Dam, proceeds in the Arroyo Seco canyon for 11 mi more: through Pasadena, South Pasadena and Northeast Los Angeles to the confluence with the Los Angeles River near Elysian Park, Chinatown and downtown Los Angeles. There are 5 parks located within the City of South Pasadena that offer the community family recreation and activities. These are Garfield Park, Eddie Park, Library Park, Orange Grove Park and War Memorial Park.

Question: where is the left anterior descending artery located?
Answer: the left coronary artery.