Context: Mare Imbrium (Latin for "Sea of Showers" or "Sea of Rains") is a vast lava plain within the Imbrium Basin on the Moon and is one of the larger craters in the Solar System. The Imbrium Basin formed from the collision of a proto-planet during the Late Heavy Bombardment. Basaltic lava later flooded the giant crater to form the flat volcanic plain seen today. The basin's age has been estimated using U-Pb dating methods to 3938 ± 4 million years ago, the diameter of the impactor has been estimated to be 250 ± 25 km. The Moon's maria (plural of mare) have fewer features than other areas of the Moon because molten lava pooled in the craters and formed a relatively smooth surface. Mare Imbrium is not as flat as it was originally because later events have altered its surface., The Indo-European languages are a language family of several hundred related languages and dialects. There are about 445 living Indo-European languages, according to the estimate by "Ethnologue", with over two-thirds (313) of them belonging to the Indo-Iranian branch. The most widely spoken Indo-European languages by native speakers are Spanish, English, Hindustani (Hindi and Urdu), Portuguese, Bengali, Russian, Persian and Punjabi, each with over 100 million speakers. Today, 46% of the human population speaks an Indo-European language natively, by far the highest of any language family., Mare Insularum (the "sea of islands") is a lunar mare located in the Insularum basin just south of Mare Imbrium. The basin material is of the Lower Imbrian epoch, with the mare material of the Upper Imbrian epoch. The mare is bordered by the craters Copernicus on the east, and Kepler on the west. Oceanus Procellarum joins the mare to the southwest., The lunar maria (singular: mare ) are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed "maria", Latin for "seas", by early astronomers who mistook them for actual seas. They are less reflective than the "highlands" as a result of their iron-rich compositions, and hence appear dark to the naked eye. The maria cover about 16 percent of the lunar surface, mostly on the side visible from Earth. The few maria on the far side are much smaller, residing mostly in very large craters. The traditional nomenclature for the Moon also includes one "oceanus" (ocean), as well as features with the names "lacus" (lake), "palus" (marsh), and "sinus" (bay). The last three are smaller than maria, but have the same nature and characteristics., The classical Latin alphabet, also known as the Roman alphabet, is a writing system originally used by the ancient Romans to write the Latin language. The Latin alphabet evolved from the visually similar Cumaean Greek version of the Greek alphabet, which was itself descended from the Phoenician abjad, which in turn was derived from Egyptian hieroglyphics. The Etruscans who ruled early Rome adopted the Cumaean Greek alphabet which was modified over time to become the Etruscan alphabet, which was in turn adopted and further modified by the Romans to produce the Latin alphabet., Oceanus Procellarum (Latin for "Ocean of Storms") is a vast lunar mare on the western edge of the near side of the Moon. It is the only one of the lunar maria to be called an "Oceanus" (ocean), due to its size: Oceanus Procellarum is the largest of the maria, stretching more than across its north-south axis and covering roughly ., The Greek alphabet has been used to write the Greek language since the late 9th century BC or early 8th century BC It was derived from the earlier Phoenician alphabet, and was the first alphabetic script to have distinct letters for vowels as well as consonants. It is the ancestor of the Latin and Cyrillic scripts. Apart from its use in writing the Greek language, in both its ancient and its modern forms, the Greek alphabet today also serves as a source of technical symbols and labels in many domains of mathematics, science and other fields., A classical language is a language with a literature that is "classical". According to UC Berkeley linguist George L. Hart, "it should be ancient, it should be an independent tradition that arose mostly on its own, not as an offshoot of another tradition, and it must have a large and extremely rich body of ancient literature.", Sinus Aestuum ( latin for `` Seething Bay '' ) forms a northeastern extension to Mare Insularum . It has selenographic coordinates 10.9 ° N , 8.8 ° W , and it lies within a diameter of 290 km. The Sinus Aestuum is a level , nearly featureless surface of low albedo basaltic lava that is marked by a few small impacts and some wrinkle ridges . The eastern border is formed by an area of irregular terrain that divides the bay from the Mare Vaporum to the east . To the north is the Montes Apenninus range and the prominent crater Eratosthenes . Along the western side is the flooded crater Stadius and the Mare Insularum to the southwest ., Latin (Latin: ) is a classical language belonging to the Italic branch of the Indo-European languages. The Latin alphabet is derived from the Etruscan and Greek alphabets., Subject: sinus aestuum, Relation: instance_of, Options: (A) 25 (B) abjad (C) age (D) alphabet (E) bay (F) bengali (G) collision (H) crater (I) family (J) giant (K) hindi (L) language (M) language family (N) literature (O) lunar mare (P) mare (Q) marsh (R) material (S) ocean (T) plain (U) planet (V) result (W) script (X) sea (Y) side (Z) surface ([) three (\) tradition (]) writing
Output: lunar mare