Question: What is the approximate area of this country where Lobelia columnaris can be found (other than Cameroon)?

full_context: Document 1: Senegal: Senegal ( ; French: "Sénégal" ), officially the Republic of Senegal (French: "République du Sénégal" ] ), is a country in West Africa. Senegal is bordered by Mauritania in the north, Mali to the east, Guinea to the southeast, and Guinea-Bissau to the southwest. Senegal also borders The Gambia, a country occupying a narrow sliver of land along the banks of the Gambia River, which separates Senegal's southern region of Casamance from the rest of the country. Senegal also shares a maritime border with Cape Verde. Senegal's economic and political capital is Dakar. It is the westernmost country in the mainland of the Old World, or Afro-Eurasia, and owes its name to the Senegal River, which borders it to the east and north. The name "Senegal" comes from the Wolof "Sunuu Gaal", which means "Our Boat". Senegal covers a land area of almost 197000 km2 and has an estimated population of about /1e6 round 0 million. The climate is Sahelian, but there is a rainy season.
Document 2: Colobanthus: Colobanthus is a large genus of small, cushion-like herbaceous plants, sometimes known as "pearlworts", a name they share with plants of the related genus "Sagina". "C. quitensis" is the world's southernmost dicot, and one of only two original flowering plants of Antarctica.
Document 3: Aerangis gracillima: Aerangis gracillima is a species of plant in the Orchidaceae family. It is found in Cameroon and Gabon. Its natural habitat is subtropical or tropical dry forests.
Document 4: Asystasia glandulifera: Asystasia glandulifera is a species of plant in the Acanthaceae family. It is endemic to Cameroon. Its natural habitat is subtropical or tropical moist lowland forests.
Document 5: Lobelia columnaris: Lobelia columnaris is a species of the Campanulaceae family. It is the only giant Lobelia occurring in West Africa and is found in Cameroon and Equatorial Guinea. Its natural habitat is subtropical or tropical dry forests.
Document 6: Spain: Spain (Spanish: "España" ] ), officially the Kingdom of Spain (Spanish: "Reino de España" ), is a sovereign state located on the Iberian Peninsula in southwestern Europe, with two large archipelagoes, the Balearic Islands in the Mediterranean Sea and the Canary Islands off the North African Atlantic coast, two cities, Ceuta and Melilla, in the North African mainland and several small islands in the Alboran Sea near the Moroccan coast. The country's mainland is bordered to the south and east by the Mediterranean Sea except for a small land boundary with Gibraltar; to the north and northeast by France, Andorra, and the Bay of Biscay; and to the west and northwest by Portugal and the Atlantic Ocean. It is the only European country to have a border with an African country (Morocco) and its African territory accounts for nearly 5% of its population, mostly in the Canary Islands but also in Ceuta and Melilla.
Document 7: Djibloho: Djibloho, officially the Administrative City of Djibloho, is the newest province of Equatorial Guinea, formally established by law in 2017. The administrative city was initially carved out of Añisok, a district in Wele-Nzas, on 1 August 2015, and was created to eventually replace Malabo as Equatorial Guinea's future national capital.
Document 8: Football in Equatorial Guinea: Association football (soccer) is the most popular sport in Equatorial Guinea. It was during the Spanish colonialism that football arrived to Equatorial Guinea. Football is now a very popular sport in the country. Recently the national team has made a few surprising results. In the qualification for the FIFA World Cup in 2006 Togo (who later qualified for the World Cup) was beaten 1-0, and in the qualification for the African Cup of Nations they beat Cameroon 1-0.
Document 9: Equatoguinean literature in Spanish: Equatorial Guinea was the only Spanish colony in Sub-Saharan Africa. During its colonial history between 1778 and 1968, it developed a tradition of literature in Spanish, unique among the countries in Africa, that persists until the present day.
Document 10: Commelina acutispatha: Commelina acutispatha is an herbaceous plant in the dayflower family found primarily in East and Central Africa, including limited distribution in the African Great Lakes country of Uganda. In addition to that country, it is known from Sierra Leone, Liberia, Ghana, Togo, Nigeria, Cameroon, Gabon, and the Democratic Republic of the Congo. It is a common species in regions of West Africa with significant forest cover, where it is often weedy. It is most common in disturbed, moist soils, in which it scrambles over other plants. The name "Commelina thomasii" was often used for West African plants until it was realized that "Commelina acutispatha", an older name originally applied to plants from the Democratic Republic of the Congo, was the same species. The petals range in color from white to pale lilac to violet; the lower petal is about half as large as the upper paired petals. The central anther is reported to have a blue patch on the connective. It has solitary spathes borne on a peduncle covered in hook-hairs.
Document 11: Equatorial Guinea: Equatorial Guinea (Spanish: "Guinea Ecuatorial" , French: "Guinée équatoriale" , Portuguese: "Guiné Equatorial" ), officially the Republic of Equatorial Guinea (Spanish: "República de Guinea Ecuatorial" , French: "République de Guinée équatoriale" , Portuguese: "República da Guiné Equatorial" ), is a country located in Central Africa, with an area of 28000 km2 . 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. s of 2015 , the country had an estimated population of 1,222,245.
Document 12: Lobelia deckenii: Lobelia deckenii (syn. "Lobelia keniensis") is a species of giant lobelia of the mountains of East Africa. It grows in moist areas, such as valley bottoms and moorland, in contrast to "Lobelia telekii" which grows in a similar, but drier habitat. These two species produce occasional hybrids. "Lobelia deckenii" plants usually produce multiple rosettes. Each rosette grows for several decades, produces a single large inflorescence and hundreds of thousands of seeds, then dies. Because individual plants have multiple rosettes, they survive to reproduce repeatedly, and plants with more rosettes flower more frequently. It is iteroparous.
Document 13: Gabon: Gabon ( ; ] ), officially the Gabonese Republic (French: "République gabonaise" ), 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 270000 sqkm and its population is estimated at 1.5 million people. Its capital and largest city is Libreville.
Document 14: Elobey, Annobón and Corisco: Elobey, Annobón, and Corisco was a colonial administration of Spanish Africa, consisting of the island of Annobón, located in the Gulf of Guinea, and the small islands of Elobey Grande, Elobey Chico and Corisco, located in the Bay of the Mitémélé River. Its total area was under 36 km², and the estimated population in 1910 was 2,950 people. The capital was Santa Isabel. The islands are presently part of Equatorial Guinea. Elobey Grande, Elobey Chico and Corisco are now part of the Litoral Province within the Continental Region of Equatorial Guinea, while Annobón constitutes a province in its own right within the Insular Region.
Document 15: Lobelia: Lobelia ( ) is a genus of flowering plants comprising 415 species, with a subcosmopolitan distribution primarily in tropical to warm temperate regions of the world, a few species extending into cooler temperate regions. They are known generally as lobelias.
ground_truth: 28000 km2