Complex sentence: According to Yoshiyuki Tomino, the creator of Gundam, The original Gundam anime took place in the year 2066, which means that the Universal Century started in the year 1988.
Split into simpler sentences: According to Yoshiyuki Tomino (The creator of Gundam), The original Gundam anime took place in the year 2066. Which means that the Universal Century started in the year 1988.