Complex sentence: Carver is of Romanichal descent on his grandmother's side, giving rise to his interest in fostering better relationships with traveller communities, and is believed to be the only British Parliamentarian from a Romany background.
Split into simpler sentences: Carver is of Romanichal descent on his grandmother's side, giving rise to his interest in fostering better relationships with traveller communities. He believes that he is the only British Parliamentarian from a Romany background.