Question: When did the country that has the Kurubaru RIver become a member of Caricom?

full_context: Document 1: Prime Minister of the West Indies Federation: This is a list of the Prime Ministers of the West Indies Federation (also known as the British Caribbean Federation), consisting of ten provinces: Antigua (with Barbuda), Barbados, Dominica, Grenada, Jamaica (with the Cayman Islands and the Turks & Caicos Islands), Montserrat, St. Christopher-Nevis-Anguilla, St. Lucia, St. Vincent, and Trinidad and Tobago. The Federation was formed on 3 January 1958, and was formally dissolved on 31 May 1962.
Document 2: Caribbean: Situated largely on the Caribbean Plate, the region comprises more than 700 islands, islets, reefs and cays. (See the list.) These islands generally form island arcs that delineate the eastern and northern edges of the Caribbean Sea. The Caribbean islands, consisting of the Greater Antilles on the north and the Lesser Antilles on the south and east (including the Leeward Antilles), are part of the somewhat larger West Indies grouping, which also includes the Lucayan Archipelago (comprising the Bahamas and Turks and Caicos Islands). The Lucayans and, less commonly, Bermuda, are also sometimes considered Caribbean despite the fact that none of these islands border the Caribbean Sea. In a wider sense, the mainland countries, regions, and territories of Belize, the Caribbean region of Colombia, Cozumel, the Yucatán Peninsula, Margarita Island, the Guyanas (Guyana, Suriname, French Guiana, Guayana Region in Venezuela, and Amapá in Brazil), are often included due to their political and cultural ties with the region.
Document 3: British Empire: Most of the UK's Caribbean territories achieved independence after the departure in 1961 and 1962 of Jamaica and Trinidad from the West Indies Federation, established in 1958 in an attempt to unite the British Caribbean colonies under one government, but which collapsed following the loss of its two largest members. Barbados achieved independence in 1966 and the remainder of the eastern Caribbean islands in the 1970s and 1980s, but Anguilla and the Turks and Caicos Islands opted to revert to British rule after they had already started on the path to independence. The British Virgin Islands, Cayman Islands and Montserrat opted to retain ties with Britain, while Guyana achieved independence in 1966. Britain's last colony on the American mainland, British Honduras, became a self-governing colony in 1964 and was renamed Belize in 1973, achieving full independence in 1981. A dispute with Guatemala over claims to Belize was left unresolved.
Document 4: Siparuni River: The Siparuni River is a river in the Potaro-Siparuni Region of Guyana. It is a tributary of the Essequibo River. Tributaries of the Siparuni River include the Takutu River (Siparuni River), Burro-Burro River, Tipuru River and Levai Creek.
Document 5: Cuyuni River: The Cuyuni River is a South American river and a tributary of the Essequibo River. It rises in the Guiana Highlands of Venezuela where it descends northward to El Dorado, and turns eastward to meander through the tropical rain forests of Guyana. It finally turns southeastward, flowing to its confluence with the Mazaruni River. The Cuyuni River marks the limit of the disputed territory of Guayana Esequiba for approximately .
Document 6: Haiama River: The Haiama River is a west bank tributary of the Demerara River in northern Guyana. It enters the Demerara River 280 yards from the mouth.
Document 7: The Branch River: The Branch River rises on south west of the settlement of Crawford River, below Girvan, south southwest of Bulahdelah, and flows generally south and then southwest, joined by five minor tributaries, before reaching its confluence with the Karuah River north of Karuah. The river descends over its course.
Document 8: Kumaka Falls: Kumaka Falls is a waterfall on the Essequibo River, Guyana, approximately 5 km north of the confluence with the Potaro River.
Document 9: Secretariat of the Caribbean Community: The original home of the CARICOM Secretariat (and its precursor the CARIFTA Secretariat) was at Colgrain House (specifically the southern half of the building, while the northern half was used as the residence of the secretary-General) on Camp Street, Georgetown, Guyana. Ground was broken for a new CARICOM Secretariat headquarters on February 25, 1998, at Liliendaal/Turkeyen. Construction of the CARICOM Secretariat Headquarters Building commenced in May 2001 and on 19 February 2005 the building was officially commissioned in an inauguration ceremony. The building was officially handed over to the CARICOM Secretariat on 15 July 2005 and the secretariat commenced operations in the building on 26 July 2006.
Document 10: Caribbean Community: Established mainly by the English - speaking parts of the Caribbean, CARICOM has become multilingual in practice with the addition of Dutch - speaking Suriname on 4 July 1995 and French - and Haitian Kreyòl - speaking Haiti on 2 July 2002. Furthermore, it was suggested that Spanish should also become a working language. In July 2012, CARICOM announced that they were considering making French and Dutch official languages. In 2001, the heads of government signed a revised Treaty of Chaguaramas that cleared the way to transform the idea of a common market CARICOM into a Caribbean (CARICOM) Single Market and Economy. Part of the revised treaty establishes and implements the Caribbean Court of Justice.
Document 11: Canje River: The Canje River, located in northeastern Guyana, is the main tributary of the Berbice River. It runs roughly parallel to the Atlantic Ocean coast.
Document 12: West Indies Federation: The West Indies Federation, also known as the West Indies, the Federation of the West Indies or the West Indian Federation, was a short-lived political union that existed from 3 January 1958 to 31 May 1962. Various islands in the Caribbean that were colonies of the United Kingdom, including Trinidad and Tobago, Barbados, Jamaica, and those on the Leeward and Windward Islands, came together to form the Federation, with its capital in Port of Spain, Trinidad and Tobago. The expressed intention of the Federation was to create a political unit that would become independent from Britain as a single state—possibly similar to the Canadian Confederation, Australian Commonwealth, or Central African Federation; however, before that could happen, the Federation collapsed due to internal political conflicts over how the Federation itself would be governed or how it would viably function. The territories that would have become part of the Federation eventually became the nine contemporary sovereign states of Antigua and Barbuda, Barbados, Dominica, Grenada, Jamaica, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, and Trinidad and Tobago; with Anguilla, Montserrat, the Cayman Islands, and Turks and Caicos Islands becoming British overseas territories. British Guiana (Guyana) and British Honduras (Belize) held observer status within the West Indies Federation.
Document 13: Kuruabaru River: The Kuruabaru River is an east bank tributary of the Demerara River in northern Guyana. It enters the Demerara River 140 miles from its mouth.
Document 14: Demerara River: The Demerara River is a river in eastern Guyana that rises in the central rainforests of the country and flows to the north for 346 kilometres until it reaches the Atlantic Ocean. Georgetown, Guyana's largest seaport and capital, is situated on the east bank of the river's mouth. The river divides Essequibo Islands-West Demerara (Region 3) on the west bank from Demerara-Mahaica (Region 4) to the east. The Demerara's estuary is narrow and the flowrate is rapid. This scouring action maintains a 5-to-6-metre-deep direct channel to the ocean. The river's deep brown color is primarily the result of the massive quantities of silt carried from upriver by the powerful currents. So powerful are these currents, that the ocean retains the Demerara's brown color for a considerable distance out to sea.
Document 15: Caribbean Community: CARICOM Members Status Name Join date Notes Full member Antigua and Barbuda 4 July 1974 Bahamas 4 July 1983 Not part of customs union Barbados 1 August 1973 One of the four founding members Belize 1 May 1974 Dominica 1 May 1974 Grenada 1 May 1974 Guyana 1 August 1973 One of the four founding members Haiti 2 July 2002 Provisional membership on 4 July 1998 Jamaica 1 August 1973 One of the four founding members Montserrat 1 May 1974 British overseas territory Saint Kitts and Nevis 26 July 1974 Joined as Saint Christopher - Nevis - Anguilla Saint Lucia 1 May 1974 Saint Vincent and the Grenadines 1 May 1974 Suriname 4 July 1995 Trinidad and Tobago 1 August 1973 One of the four founding members Associate Anguilla July 1999 British overseas territory Bermuda 2 July 2003 British overseas territory British Virgin Islands July 1991 British overseas territory Cayman Islands 16 May 2002 British overseas territory Turks and Caicos Islands July 1991 British overseas territory Observer Aruba Constituent country of the Kingdom of the Netherlands Colombia Curaçao Constituent country of the Kingdom of the Netherlands Dominican Republic Mexico Puerto Rico Unincorporated territory of the United States Sint Maarten Constituent country of the Kingdom of the Netherlands Venezuela
ground_truth: 1 August 1973
sub_queries: Kuruabaru River >> country Answer: Guyana
when did Guyana became a member of caricom Answer: 1 August 1973