Q:Information: - Joseph Harold Greenberg (May 28, 1915 May 7, 2001) was an American linguist, principally known for his work in two areas, linguistic typology and the genetic classification of languages. - The Federal Republic of Nigeria , commonly referred to as Nigeria, is a federal republic in West Africa, bordering Benin in the west, Chad and Cameroon in the east, and Niger in the north. Its coast in the south lies on the Gulf of Guinea in the Atlantic Ocean. It comprises 36 states and the Federal Capital Territory, where the capital, Abuja is located. Its largest cities include: Lagos, Kano, Ibadan, Benin City and Port Harcourt. Nigeria is officially a democratic secular country. - The Lower Cross River languages form a branch of the Cross River languages of Rivers State , Nigeria . They consist of the divergent Obolo language ( or Andoni , 200,000 speakers ) , and the core of the branch , which includes the 4 million speakers of the Efik - Ibibio cluster . Obolo Lower Cross proper : Efik - Ibibio , Ibino ( Ibeno ) , Oro ( Oron ) , Okobo , Iko , Ebughu , Ilue , Enwang - Uda , Usaghade Forde and Jones ( 1950 ) considered Ibino and Oro to be Efik - Ibibio . - The Cross River or DeltaCross languages are a branch of the BenueCongo language family in south-easternmost Nigeria posited by Joseph Greenberg. It is one of the few of his branches of NigerCongo that has withstood the test of time. - Okrika is a port town in Rivers State, Nigeria, capital of the Local Government Area of the same name. The town is situated on a small island just south of Port Harcourt, making it a suburb of the much larger city. - Port Harcourt (Igbo: Igucha; Pidgin: "Po-ta-kot") is the capital and largest city of Rivers State, Nigeria. It lies along the Bonny River and is located in the Niger Delta. As of 2016, the Port Harcourt urban area has an estimated population of 1,865,000 inhabitants, up from 1,382,592 as of 2006. - Etche is a Local Government Area (LGA) in Rivers State, Nigeria, named after the Etche (Echie) people of Southern Nigeria. They also inhabit Omuma LGA; Etche/Omuma is a National Assembly constituency. - Rivers State, also known simply as Rivers, is one of the 36 states of Nigeria. According to census data released in 2006, the state has a population of 5,185,400, making it the sixth-most populous state in the country. Its capital, Port Harcourt is the largest city and is economically significant as the centre of Nigeria's oil industry. Rivers State is bounded on the South by the Atlantic Ocean, to the North by Imo, Abia and Anambra States, to the East by Akwa Ibom State and to the West by Bayelsa and Delta states. It is home to many indigenous ethnic groups: Ikwerre, Ibani, Opobo, Eleme, Okrika, and Kalabari, Etche, Ogba, Ogoni, Engenni, Obolo and others. The people from Rivers State are known as "Riverians". - The Atlantic Ocean is the second largest of the world's oceans with a total area of about . It covers approximately 20 percent of the Earth's surface and about 29 percent of its water surface area. It separates the "Old World" from the "New World". Given the paragraphs above, decide what entity has the relation 'instance of' with 'language family'.
A:
lower cross river languages