Complex sentence: Head of the Griffin family is Irish-American Catholic Peter, an obese and bespectacled man who is just a big child he has other roots beside his Irish ones, including African-American, Spanish, Scottish and German.
Split into simpler sentences: Head of the Griffin family is Irish-American Catholic Peter, an obese and bespectacled man who is just a big child. He has other roots beside his Irish ones, including African-American, Spanish, Scottish and German.