You will be given a definition of a task first, then some input of the task.
In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: In classical mechanics, linear momentum, translational momentum, or simply momentum (pl. momenta; SI unit kg · m/s) is the product of the mass and velocity of an object, quantified in kilogram-meters per second. It is dimensionally equivalent to impulse, the product of force and time, quantified in newton-seconds. Newton's second law of motion states that the change in linear momentum of a body is equal to the net impulse acting on it. For example, a heavy truck moving rapidly has a large momentum, and it takes a large or prolonged force to get the truck up to this speed, and would take a similarly large or prolonged force to bring it to a stop. If the truck were lighter, or moving more slowly, then it would have less momentum and therefore require less impulse to start or stop., A joint lock is a grappling technique involving manipulation of an opponent's joints in such a way that the joints reach their maximal degree of motion. , Aikido techniques consist of entering and turning movements that redirect the momentum of an opponent's attack, and a throw or joint lock that terminates the technique., Hitohiro Saito (   Sait Hitohiro , born 12 February 1957 in Iwama ) is an aikido instructor and founding headmaster of Iwama Shin - Shin Aiki Shuren - kai . Hitohiro is the son of Morihiro Saito . At age of seven , he started to learn aikido from Morihei Ueshiba , the founder of aikido , who cared for him as a grandson . . After Ueshiba died in 1969 , he continued his practice with his father . The younger Saito became official instructor of the Iwama dojo in 1986 and remained so until 2004 when he separated from the Aikikai organization and formed his own group . Since 2009 he is also identified as Hitohira (  ) Saito ., The Aikikai is the original school of Aikido. It is centered on the Aikikai Foundation in Japan, and its figurehead is the Doshu (the family heir of the founder of Aikido). It is represented globally through the International Aikido Federation., Mongolia (Mongolian: ["Monggol Ulus"] in Mongolian script; ["Mongol Uls"] in Mongolian Cyrillic) is a landlocked unitary sovereign state in East Asia. Its area is roughly equivalent with the historical territory of Outer Mongolia, and that term is sometimes used to refer to the current state. It is sandwiched between China to the south and Russia to the north. While it does not share a border with Kazakhstan, Mongolia is separated from it by only ., Martial arts are codified systems and traditions of combat practices, which are practiced for a number of reasons: as self-defense, military and law enforcement applications, mental and spiritual development; as well as entertainment and the preservation of a nation's intangible cultural heritage., In the Western world, the term "dj" primarily refers to a training place specifically for Japanese martial arts such as aikido, judo, karate, or samurai; in Japan, any physical training facility, including professional wrestling schools, may be called "dj" because of its close martial arts roots. The term can also refer to a formal training place for any of the Japanese arts ending in "do", meaning "way"., The Russo-Japanese War (8 February 1904  5 September 1905) was fought between the Russian Empire and the Empire of Japan over rival imperial ambitions in Manchuria and Korea. The major theatres of operations were the Liaodong Peninsula and Mukden in Southern Manchuria and the seas around Korea, Japan and the Yellow Sea., The son of a landowner from Tanabe, Ueshiba studied a number of martial arts in his youth, and served in the Japanese Army during the Russo-Japanese War. After being discharged in 1907, he moved to Hokkaid as the head of a pioneer settlement; here he met and studied with Takeda Sokaku, the founder of Dait-ry aiki-jjutsu. On leaving Hokkaido in 1919, Ueshiba joined the moto-ky movement, a Shinto sect, in Ayabe, where he served as a martial arts instructor and opened his first dojo. He accompanied the head of the moto-ky group, Onisaburo Deguchi, on an expedition to Mongolia in 1924, where they were captured by Chinese troops and returned to Japan. The following year, he experienced a great spiritual enlightenment, stating that, "a golden spirit sprang up from the ground, veiled my body, and changed my body into a golden one." After this experience, his martial arts skill appeared to be greatly increased., Iwama dojo is a dojo built by the founder of aikido, Morihei Ueshiba, who lived there from 1942 until his death in 1969. It is located in the former town of Iwama and became an important historical location for the development of aikido and "a Mecca to the aikido community." This dojo is also where Morihiro Saito, one of the founder's closest students, learned and taught aikido from 1946 until 2002 developing what is often referred to as the Iwama Style., Morihiro Saito (  "Sait Morihiro", March 31, 1928May 13, 2002) was a teacher of the Japanese martial art of aikido, with many students around the world. Saito's practice of aikido spanned 56 years, from the age of 18, when he first met aikido founder Morihei Ueshiba, until his death in 2002., Iwama Style Aikido is the style of aikido that was taught at Iwama dojo (in Iwama) by the founder of aikido, Morihei Ueshiba, and especially the lineage passed on through Morihiro Saito, a close disciple who was given responsibility over Iwama dojo by Ueshiba., , also called kami-no-michi, is a Japanese ethnic religion. It focuses on ritual practices to be carried out diligently, to establish a connection between present-day Japan and its ancient past. Shinto practices were first recorded and codified in the written historical records of the "Kojiki" and "Nihon Shoki" in the 8th century. Still, these earliest Japanese writings do not refer to a unified "Shinto religion", but rather to a collection of native beliefs and mythology. Shinto today is a term that applies to the religion of public shrines devoted to the worship of a multitude of gods ("kami"), suited to various purposes such as war memorials and harvest festivals, and applies as well to various sectarian organizations. Practitioners express their diverse beliefs through a standard language and practice, adopting a similar style in dress and ritual, dating from around the time of the Nara and Heian periods (8th to 12th centuries AD)., Japan ("Nippon" or "Nihon" ; formally "" or "Nihon-koku", means "State of Japan") is a sovereign island nation in Eastern Asia. Located in the Pacific Ocean, It is lying off the eastern coast of the Asia Mainland (east of China, Korea, Russia) and stretching from the Sea of Okhotsk in the north to the East China Sea and near Taiwan in the southwest. , , originally called , is a Japanese martial art that first became widely known in the early 20th century under the headmastership of Takeda Skaku. Takeda had extensive training in several martial arts (including Kashima Shinden Jikishinkage-ry and sumo) and referred to the style he taught as "Dait-ry" (literally, "Great School"). Although the school's traditions claim to extend back centuries in Japanese history there are no known extant records regarding the "ry" before Takeda. Whether Takeda is regarded as either the restorer or the founder of the art, the known history of Dait-ry begins with him. Takeda's best-known student was Morihei Ueshiba, the founder of aikido., Subject: hitohiro saito, Relation: occupation, Options: (A) acting (B) army (C) founder (D) grappling (E) judo (F) landowner (G) law enforcement (H) major (I) military (J) pioneer (K) religion (L) restorer (M) samurai (N) script (O) sovereign (P) taiwan (Q) teacher
Output:
samurai