Complex sentence: He discovered a new island to which he gave the name of Elide, in memory of his first tormented love.He returned to this island in 1857, taking possession in the name of the Mexican Government.
Split into simpler sentences: He discovered a new island to which he gave the name of Elide, in memory of his first tormented love. In this island he returned in 1857, taking possession in the name of the Mexican Government.