Information:  - Cuba, officially the Republic of Cuba, is a country comprising the island of Cuba as well as Isla de la Juventud and several minor archipelagos. Cuba is located in the northern Caribbean where the Caribbean Sea, the Gulf of Mexico, and the Atlantic Ocean meet. It is south of both the U.S. state of Florida and the Bahamas, west of Haiti, and north of Jamaica. Havana is the largest city and capital; other major cities include Santiago de Cuba and Camagüey. Cuba is the largest island in the Caribbean, with an area of , and the second-most populous after Hispaniola, with over 11 million inhabitants.  - The Dominican Republic is a sovereign state occupying the eastern two-thirds of the island of Hispaniola, in the Greater Antilles archipelago in the Caribbean region. The western one-third of the island is occupied by the nation of Haiti, making Hispaniola one of two Caribbean islands, along with Saint Martin, that are shared by two countries. The Dominican Republic is the second-largest Caribbean nation by area (after Cuba) at , and 3rd by population with 10.08 million people, of which approximately three million live in the metropolitan area of Santo Domingo, the capital city.  - Hispaniola (Spanish: "La Española"; Latin: "Hispaniola"; Taíno: "Haiti") is the 22nd-largest island in the world, located in the Caribbean island group, the Greater Antilles. It is the second largest island in the Caribbean after Cuba, and the tenth most populous island in the world.  - Jamaica is an island country situated in the Caribbean Sea, consisting of the third-largest island of the Greater Antilles. The island, in area, lies about south of Cuba, and west of Hispaniola (the island containing the nation-states of Haiti and the Dominican Republic). Jamaica is the fourth-largest island country in the Caribbean, by area.  - Prorastomus sirenoides is an extinct species of primitive sirenian that lived during the Eocene Epoch 40 million years ago in Jamaica .  - The transition between the end of the Eocene and the beginning of the Oligocene is marked by large-scale extinction and floral and faunal turnover (although minor in comparison to the largest mass extinctions). Most of the affected organisms were marine or aquatic in nature. They included the last of the ancient cetaceans, the Archaeoceti.  - The Paleogene (or ; also spelled Palaeogene or Palæogene; informally Lower Tertiary) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago (Mya) to the beginning of the Neogene Period Mya. It is the beginning of the Cenozoic Era of the present Phanerozoic Eon. The Paleogene is most notable for being the time during which mammals diversified from relatively small, simple forms into a large group of diverse animals in the wake of the CretaceousPaleogene extinction event that ended the preceding Cretaceous Period.   - Sirenia, commonly referred to as sea cows, is an order of fully aquatic, herbivorous mammals that inhabit swamps, rivers, estuaries, marine wetlands, and coastal marine waters. Sirenia comprises the families Dugongidae (the dugong), Trichechidae (manatees), Protosirenidae (Eocene sirenians), and Prorastomidae (terrestrial sirenians). There are currently four extant species of sirenians. Sirenians are classified in the clade Paenungulata, alongside the elephants and the hyraxes, and evolved in the Eocene 50 million years ago. The Dugongidae diverged from the Trichechidae in the late Eocene or early Oligocene.  - The Eocene Epoch, lasting from , is a major division of the geologic timescale and the second epoch of the Paleogene Period in the Cenozoic Era. The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope C in the atmosphere was exceptionally low in comparison with the more common isotope C. The end is set at a major extinction event called the "Grande Coupure" (the "Great Break" in continuity) or the EoceneOligocene extinction event, which may be related to the impact of one or more large bolides in Siberia and in what is now Chesapeake Bay. As with other geologic periods, the strata that define the start and end of the epoch are well identified, though their exact dates are slightly uncertain.    Given the information above, choose from the list below the object entity that exhibits the relation 'parent taxon' with the subject 'prorastomus'.  Choices: - archaeoceti  - area  - la  - mya  - prorastomidae
A:
prorastomidae