Complex sentence: Marcus Garvey and his 1st wife, Amy Ashwood Garvey say that they are of Ashanti descent, which is commonplace for many black Jamaicans to have this descent.
Split into simpler sentences: Marcus Garvey and his 1st wife, Amy Ashwood Garvey are of Ashanti descent. It is commonplace for many black Jamaicans to have this descent.