Please answer the following question: Information:  - Italy, officially the Italian Republic, is a unitary parliamentary republic in Europe. Located in the heart of the Mediterranean Sea, Italy shares open land borders with France, Switzerland, Austria, Slovenia, San Marino and Vatican City. Italy covers an area of and has a largely temperate seasonal climate and Mediterranean climate; due to its shape, it is often referred to in Italy as "lo Stivale" (the Boot). With 61 million inhabitants, it is the fourth most populous EU member state.  - Lipari (, Ancient Greek: "" (Meligunís) or "" (Lipára)) is the largest of the Aeolian Islands in the Tyrrhenian Sea off the northern coast of Sicily, southern Italy; it is also the name of the island's main town. Its population is 11,231, but during the May to September tourist season, the total population may reach up to 20,000.  - Alicudi is the westernmost of the eight islands that make up the Aeolian archipelago , a volcanic island chain north of Sicily . The island is about 40 km ( 25 mi ) west of Lipari , has a total area of 5.2 km2 ( 2.0 sq mi ) , and is roughly circular . It is located at 38 ° 32  45 `` N 14 ° 21  00 '' E.  - The Tyrrhenian Sea (, , , ) is part of the Mediterranean Sea off the western coast of Italy. It is named for the Tyrrhenian people, identified since the 6th century BCE with the Etruscans of Italy.  - Sicily is the largest island in the Mediterranean Sea. It constitutes an autonomous Region of Italy, along with surrounding minor islands, officially referred to as "Regione Siciliana" (in Italian, Sicilian Region).  - Ancient Greek includes the forms of Greek used in ancient Greece and the ancient world from around the 9th century BC to the 6th century AD. It is often roughly divided into the Archaic period (9th to 6th centuries BC), Classical period (5th and 4th centuries BC), and Hellenistic period (3rd century BC to the 6th century AD). It is antedated in the second millennium BC by Mycenaean Greek.  - The Aeolian Islands (, , , "Aiolides Nisoi") are a volcanic archipelago in the Tyrrhenian Sea north of Sicily, named after the demigod of the winds Aeolus. The islands' inhabitants are known as Aeolians. The Aeolian Islands are a popular tourist destination in the summer and attract up to 200,000 visitors annually.  - The Mediterranean Sea (pronounced ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Southern Europe and Anatolia, on the south by North Africa, and on the east by the Levant. The sea is sometimes considered a part of the Atlantic Ocean, although it is usually identified as a separate body of water.    What object entity has the relation of 'located on terrain feature' with the subject 'alicudi'?   Choices: - africa  - atlantic ocean  - europe  - greece  - mediterranean sea  - sicily  - switzerland  - the levant  - tyrrhenian sea
A:
tyrrhenian sea