Complex sentence: Mark Bergfeld is a former member of the National Executive Council of the National Union of Students (NUS), spokesperson of the Education Activist Network and is a former member of the Central Committee of the Socialist Workers Party (SWP).
Split into simpler sentences: Mark Bergfeld is a former member of the National Executive Council of the National Union of Students (NUS), spokesperson of the Education Activist Network. He is a former member of the Central Committee of the Socialist Workers Party (SWP).