Complex sentence: The host of "Iron Chef America", Mark Dacascos, is claimed on "ICA" to be Takeshi's nephew, though the stated relationship is actually between the fictional characters played by the two men.
Split into simpler sentences: The host of "Iron Chef America", Mark Dacascos, is claimed on "ICA" to be Takeshi's nephew. The stated relationship is actually between the fictional characters played by the two men.