Question: Which god of the grape harvest did a mythical Greek sailor transformed into a dolphin for attempting to abduct

full_context: Document 1: Semele: Semele ( ; Greek: Σεμέλη "Semelē"), in Greek mythology, daughter of the Boeotian hero Cadmus and Harmonia, was the mortal mother of Dionysus by Zeus in one of his many origin myths.
Document 2: Theatre of ancient Greece: The ancient Greek drama was a theatrical culture that flourished in ancient Greece from c. 700 BC. The city-state of Athens, which became a significant cultural, political, and military power during this period, was its center, where it was institutionalised as part of a festival called the Dionysia, which honoured the god Dionysus. Tragedy (late 500 BC), comedy (490 BC), and the satyr play were the three dramatic genres to emerge there. Athens exported the festival to its numerous colonies and allies in order to promote a common cultural identity.
Document 3: Orphism (religion): Orphism (more rarely Orphicism; Ancient Greek: Ὀρφικά) is the name given to a set of religious beliefs and practices originating in the Ancient Greek and Hellenistic world, as well as by the Thracians, associated with literature ascribed to the mythical poet Orpheus, who descended into the Greek underworld and returned. Orphics also revered Persephone (who annually descended into the Underworld for a season and then returned) and Dionysus or Bacchus (who also descended into the Underworld and returned). Orpheus was said to have invented the Mysteries of Dionysus. Poetry containing distinctly Orphic beliefs has been traced back to the 6th century BC or at least 5th century BC, and graffiti of the 5th century BC apparently refers to "Orphics".
Document 4: Comus: In Greek mythology, Comus (Ancient Greek: Κῶμος ) is the god of festivity, revels and nocturnal dalliances, as depicted in the 1921 children's book, "Comus" by John Milton and Arthur Rackham. He is a son and a cup-bearer of the god Bacchus. Comus represents anarchy and chaos. His mythology occurs in the later times of antiquity. During his festivals in Ancient Greece, men and women exchanged clothes. He was depicted as a young man on the point of unconsciousness from drink. He had a wreath of flowers on his head and carried a torch that was in the process of being dropped. Unlike the purely carnal Pan or purely intoxicated Dionysos, Comus was a god of excess.
Document 5: HMS Egeria (1873): HMS "Egeria" was a 4-gun screw sloop of the "Fantome" class launched at Pembroke on 1 November 1873. She was named after Egeria, a water nymph of Roman mythology, and was the second ship of the Royal Navy to bear the name. After a busy career in the East Indies, Pacific, Australia and Canada, she was sold for breaking in 1914 and was burnt at Burrard Inlet in British Columbia.
Document 6: USS Egeria (ARL-8): USS "Egeria" (ARL-8) was one of 39 "Achelous"-class landing craft repair ships built for the United States Navy during World War II. Named for Egeria (a fountain nymph in Roman mythology, and the wife of Numa Pompilius), she was the only U.S. Naval vessel to bear the name.
Document 7: HMS Galgo: Five ships of the Royal Navy have borne the name HMS "Galgo", after the Galgo Español, the Spanish greyhound:
Document 8: HMS Prospero: Three ships of the British Royal Navy have been named Prospero for the Shakespearean character Prospero:
Document 9: Dionysus in comparative mythology: Dionysus, the god of wine, theatre, and ecstasy in ancient Greek religion, has been compared to many other deities, both by his classical worshippers and later scholars. These deities include figures outside of ancient Greek religion, such as Jesus, Osiris, Shiva, and Tammuz, as well as figures inside of ancient Greek religion, such as Hades.
Document 10: Ganymede (mythology): In Greek mythology, Ganymede ( ; ; Greek: Γανυμήδης , "Ganymēdēs") is a divine hero whose homeland was Troy. He was the son of Tros of Dardania, from whose name "Troy" was supposedly derived, and of Callirrhoe, the daughter of the river god Scamander. His brothers were Ilus and Assaracus. In one version of the myth, he is abducted by Zeus, in the form of an eagle, to serve as cup-bearer in Olympus. Homer describes Ganymede as the most beautiful of mortals:
Document 11: HMS Sable: Two ships of the Royal Navy have been called HMS "Sable" after the small carnivorous mammal:
Document 12: HMS Ethalion: Two ships of the Royal Navy have been named HMS "Ethalion" after Ethalion, a mythical Greek sailor transformed into a dolphin for attempting to abduct Dionysus, whilst another was planned:
Document 13: Altis: The Altis (Greek: Ἄλτις) also referred to as the sanctuary to the gods, is the name of a location most well known for being a place of significant religious importance to the Ancient Greeks, considered to be a sacred precinct that was constructed and used from around 776 BCE to fourth century BCE and used for the worship of several Greek gods and goddesses. Though the architects are not definitively known, it is generally attributed to be partially the work of Libon of Elis. Located in the wide valley of the Alfeiós River (also Romanized as Alpheus, Alpheios) in the western part of Peloponnesus, around 18 kilometers away from the Ionian Sea, the name Altis was derived from a corruption of the Elean word alsos meaning “the grove” because the area was thickly wooded with oaks, plane trees, poplars, and olives. The structure itself was an irregular quadrangular area more than 200 yards (183 meters) on each side and walled except to the North where it was bounded by the Kronion (Mount Kronos). Inside were sanctuaries, the centers of religious worship, where the Greeks built over 70 temples, treasuries, altars, statues, and other structures in dedication to their gods. The site was continuously inhabited from Mycenaean times until the 6th century BCE, where cult activity apparently first began at the foot of the hill of Kronos where altars to the goddesses Rhea, Gaia, and Eileithyia have left their traces. Some other cults found here were devoted to figures like the hero cult of Pelops and Hippodameia (arguably the oldest shrine there) important mythological figures that are generally known for the founding myth of the Olympic Games. During the time of the Dorian Invasion settlers from northwestern Greece inhabited the Altis whereby they introduced the worship of two major Greek deities in the Greek pantheon Hera and Zeus as well as constructing the most memorable things there, the Sanctuary and altar of Zeus, where to this day the ruins of the two principal temples: the Temple of Hera (6th century BCE) and the Temple of Zeus (5th century BCE) still remain. Throughout Antiquity this Temple was considered the most perfect example of the Doric order. This sanctuary also contained one of the highest concentrations of masterpieces of the ancient Mediterranean world though many have since been lost. In connection with the cult of Zeus the Altis was then given the name Olympia, with famous Olympia, Greece being built on this site where also the first Olympic Games took place here, once every four years.
Document 14: HMS Scipion: Two ships of the British Royal Navy have borne the name HMS "Scipion", after the French term for the Roman general Scipio Africanus:
Document 15: Dionysus: Dionysus ( ; Greek: Διόνυσος "Dionysos") is the god of the grape harvest, winemaking and wine, of ritual madness, fertility, theatre and religious ecstasy in ancient Greek religion and myth. Wine played an important role in Greek culture, and the cult of Dionysus was the main religious focus for its unrestrained consumption. His worship became firmly established in the seventh century BC. He may have been worshipped as early as c. 1500–1100 BC by Mycenean Greeks; traces of Dionysian-type cult have also been found in ancient Minoan Crete. His origins are uncertain, and his cults took many forms; some are described by ancient sources as Thracian, others as Greek. In some cults, he arrives from the east, as an Asiatic foreigner; in others, from Ethiopia in the South. He is a god of epiphany, "the god that comes", and his "foreignness" as an arriving outsider-god may be inherent and essential to his cults. He is a major, popular figure of Greek mythology and religion, becoming increasingly important over time, and included in some lists of the twelve Olympians, as the last of their number, and the only god born from a mortal mother. His festivals were the driving force behind the development of Greek theatre.
ground_truth: Dionysus