Question: The Sukhoi/HAL Fifth Generation Fighter Aircraft is a derivative of another Russian plane thats international name is what?

Context paragraphs:
KAB-1500L: KAB-1500L is a Russian precision guided weapon, a laser guided bomb and also the current production standard for use on 4+ and 4++ generation fighter jets, like the Sukhoi Su-30MKI/Sukhoi Su-30MKK, Sukhoi Su-34 and Sukhoi Su-35.  It is claimed to be the Russian equivalent to USA's Paveway II/Paveway III and is designed to hit railway, ammunition depots, railway terminals, highway bridges, military and industrial facilities, ships and transport vessels.  The KAB-1500LG-F-E has an impact fuse which includes 3 different delay modes for target attack and it can also be mounted on older aircraft, like the Sukhoi Su-24 and the Mikoyan MiG-27.

Sukhoi Su-47: The Sukhoi Su-47 "Berkut" (Russian: Сухой Су-47 Беркут—"Golden Eagle" ) (NATO reporting name Firkin), also designated S-32 and S-37 (not to be confused with the twin-engined delta canard design offered by Sukhoi in the early 1990s under the designation Su-37) during initial development, was an experimental supersonic jet fighter developed by Sukhoi Aviation Corporation.  A distinguishing feature of the aircraft was its forward-swept wing that gave the aircraft excellent agility and maneuverability.  While serial production of the type never materialized, the sole aircraft produced served as a technology demonstrator prototype for a number of advanced technologies later used in the 4.5 generation fighter SU-35BM and current fifth-generation jet fighter prototype Sukhoi Su-57.

Sukhoi/HAL FGFA: The Sukhoi/HAL Fifth Generation Fighter Aircraft (FGFA) or Perspective Multi-role Fighter (PMF) is a fifth-generation fighter being developed by India and Russia.  It is a derivative project of the Russian Sukhoi Su-57 being developed for the Russian Air Force.  The FGFA was the earlier designation for the Indian version, while the combined project is now called the Perspective Multi-Role Fighter (PMF).

HAL AMCA: The HAL Advanced Medium Combat Aircraft (AMCA) is an Indian programme of a fifth-generation fighter aircraft.  It is being developed by an aerospace industry team which consists of the Aeronautical Development Agency (ADA) as the design firm with manufacturing carried out by Hindustan Aeronautics Limited (HAL) as the primary contractor and main assembly firm.  It is a single-seat, twin-engine, stealth supermaneuverable all weather multirole fighter aircraft.  Unofficial design work on the AMCA started in 2008 with official work started in 2011 and completed in 2014.  In 2008, the Indian Navy joined the programme seeking a naval variant optimized for operation from aircraft carriers.  The first flight is scheduled to occur in 2019.

Sukhoi Su-30: The Sukhoi Su-30 (Russian: Сухой Су-30 ; NATO reporting name: Flanker-C) is a twin-engine, two-seat supermaneuverable fighter aircraft developed by Russia's Sukhoi Aviation Corporation.  It is a multirole fighter for all-weather, air-to-air and air-to-surface deep interdiction missions.

M-ATF: The M-ATF program was originally a project between Russia and Iran to produce a fourth+ generation fighter plane that would be excellent for developing nations who want to become self-sufficient and self-reliant.  The program was eventually abandoned by Russia and Iran, though now some evidence has become available that Iran has either revived the program or using it to advance its Shafaq program.  The program traces its roots to the Russian cancelled Mikoyan Project LFI program; the aircraft was also referred to as the MiG-I-2000 or Vityaz2000.A model of the original aircraft was shown at Iran Airshow 2005.

Sukhoi Su-57: The Sukhoi Su-57 (Russian: Сухой Су-57 ) is the designation intended for a stealth, single-seat, twin-engine jet multirole fighter aircraft designed for air superiority and attack operations.  The aircraft is the product of the PAK FA (Russian: ПАК ФА , Russian: Перспективный авиационный комплекс фронтовой авиации , "Perspektivny Aviatsionny Kompleks Frontovoy Aviatsii", literally "Prospective Airborne Complex of Frontline Aviation"), a fifth-generation fighter programme of the Russian Air Force.  Sukhoi's internal name for the aircraft is T-50.  The Su-57 will be the first aircraft in Russian military service to use stealth technology.  The fighter is planned to have supercruise, stealth, supermaneuverability and advanced avionics to overcome the prior generation fighter aircraft as well as ground and maritime defences.

Heinkel He 162: The Heinkel He 162 "Volksjäger (German, "People's Fighter"), the name of a project of the Emergency Fighter Program design competition, was a German single-engine, jet-powered fighter aircraft fielded by the Luftwaffe in World War II.  Designed and built quickly, and made primarily of wood as metals were in very short supply and prioritised for other aircraft, the He 162 was nevertheless the fastest of the first generation of Axis and Allied jets.  "Volksjäger" was the Reich Air Ministry's official name for the government design program competition won by the He 162 design.  Other names given to the plane include "Salamander", which was the codename of its construction program, and Spatz" ("Sparrow"), which was the name given to the plane by Heinkel.

Byelka (radar): N036 Byelka (Russian: Белка , literally Squirrel) is an advanced active electronically scanned array radar system developed by Tikhomirov NIIP for the fifth generation Sukhoi Su-57 fighter aircraft.  NIIP developed the radar from the N035 Irbis-E that was equipped on the Su-35S fighter aircraft.

Sukhoi Su-27: The Sukhoi Su-27 (Russian: Сухой Су-27 ; NATO reporting name: Flanker; nicknamed "Sushka" in USSR) is a twin-engine supermaneuverable fighter aircraft designed by Sukhoi.  It was intended as a direct competitor for the large United States fourth-generation fighters such as the Grumman F-14 Tomcat and F-15 Eagle, with 3530 km range, heavy aircraft ordnance, sophisticated avionics and high maneuverability.  The Su-27 was designed for air superiority missions, and subsequent variants are able to perform almost all aerial warfare operations.  It was designed with the Mikoyan MiG-29 as its complement.

Supporting paragraphs: Sukhoi/HAL FGFA Sukhoi Su-57
Answer: T-50