Complex sentence: During his absence he was replaced by his nephew, Stevie Young, but it was reported that some fans could not tell that Young had been replaced by his nephew as Stevie Young bore a striking resemblance to his uncle.
Split into simpler sentences: During his absence he was replaced by his nephew, Stevie Young. It was reported that some fans could not tell that Young had been replaced by his nephew as Stevie Young bore a striking resemblance to his uncle.