Please answer the following question: Information:  - The Gulf of Guinea is the northeasternmost part of the tropical Atlantic Ocean between Cape Lopez in Gabon, north and west to Cape Three Points in Western region Ghana. The intersection of the Equator and Prime Meridian (zero degrees latitude and longitude) is in the gulf.  - Cameroon, officially the Republic of Cameroon, is a country in Central Africa. It is bordered by Nigeria to the west; Chad to the northeast; the Central African Republic to the east; and Equatorial Guinea, Gabon, and the Republic of the Congo to the south. Cameroon's coastline lies on the Bight of Bonny, part of the Gulf of Guinea and the Atlantic Ocean.  - Equatorial Guinea, officially the Republic of Equatorial Guinea, is a country located in Central Africa, with an area of . Formerly the colony of Spanish Guinea, its post-independence name evokes its location near both the Equator and the Gulf of Guinea. Equatorial Guinea is the only sovereign African state in which Spanish is an official language. , the country has an estimated population of over 1.2 million.  - Spanish Guinea (Spanish: "Guinea Española") was a set of insular and continental territories controlled by Spain since 1778 in the Gulf of Guinea and on the Bight of Bonny, in Central Africa. It gained independence in 1968 and is known as Equatorial Guinea.  - The Komo is a river of Equatorial Guinea and Gabon . It flows for 230 kilometres ( 140 mi ) . It rises in Equatorial Guinea in the southwestern part of the Woleu - Ntem plateau . However much of its watershed is in the territory of Gabon . The largest tributary of the River Komo is the Mbeya River . Its course is disturbed by geological barriers that produce waterfalls as those at Tchimbélé and Kinguélé . They are potential hydroelectric power supplies for Libreville .  - The Republic of the Congo, also known as the Congo Republic, West Congo, Congo-Brazzaville or simply Congo, is a country located in Central Africa. It is bordered by five countries: Gabon and the Atlantic Ocean to the west; Cameroon to the northwest; the Central African Republic to the northeast; the Democratic Republic of the Congo to the east and south; and the Angolan exclave of Cabinda to the southwest.  - Gabon, officially the Gabonese Republic, is a sovereign state on the west coast of Central Africa. Located on the equator, Gabon is bordered by Equatorial Guinea to the northwest, Cameroon to the north, the Republic of the Congo on the east and south, and the Gulf of Guinea to the west. It has an area of nearly and its population is estimated at 1.5 million people. Its capital and largest city is Libreville.  - Libreville is the capital and largest city of Gabon, in west central Africa. The city is a port on the Komo River, near the Gulf of Guinea, and a trade center for a timber region. its census population was 703,904.  - Africa is the world's second-largest and second-most-populous continent. At about 30.3 million km² (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area and 20.4 % of its total land area. With 1.1 billion people as of 2013, it accounts for about 15% of the world's human population. The continent is surrounded by the Mediterranean Sea to the north, both the Suez Canal and the Red Sea along the Sinai Peninsula to the northeast, the Indian Ocean to the southeast, and the Atlantic Ocean to the west. The continent includes Madagascar and various archipelagos. It contains 54 fully recognized sovereign states (countries), nine territories and two "de facto" independent states with limited or no recognition.    Given the information, choose the subject and object entities that have the relation of 'mouth of the watercourse'.
Answer:
komo river , atlantic ocean