Complex sentence: He and his mother have been outspoken homeless advocates for many years and continue to be, walking in protests, helping to educate voters, and volunteering to help provide food and shelter to the urban poor in Philadelphia and elsewhere.
Split into simpler sentences: He and his mother have been outspoken homeless advocates for many years and continue to be. They walk in protests, help to educate voters, and volunteer to help provide food and shelter to the urban poor in Philadelphia and elsewhere.