structural:expansion, linguistic:translation
Buyeo, Goguryeo, and Baekje

The river god sends Yuhwa into exile. She is captured by a fisherman and brought to Geumwa the frog-king, who has succeeded his adopted father in Eastern Buyeo. He keeps her in an annex of the palace. One day, sunlight falls on Yuhwa from the heavens, impregnating her. She gives birth to an egg from her left armpit, and a boy hatches from the egg. The boy is supernaturally potent, including shooting down flies with a bow—for which he is named Jumong, "good archer." The king makes Jumong the stable-keeper, which offends him enough that he decides to found his own kingdom. With three companions, Jumong flees south, leaving his mother and wife behind. When they find an unfordable river, Jumong proclaims his divine descent, and the fish and turtles of the river allow them to cross on their backs. Jumong founds the kingdom of Goguryeo in 37 BCE. He is opposed by an established local chieftain named Songyang. After a series of confrontations between the two, Songyang ultimately surrenders when Jumong causes a great flood in his country.