Complex sentence: The Campaign For A New Workers'Party (CNWP) argues for the establishment of a new mass workers' party, involving trade union activists, socialists, anti-capitalist young people, and community, anti-war and environmental activists.
Split into simpler sentences: The Campaign For A New Workers'Party (CNWP) is a broad campaign which argues for the establishment of a new mass workers' party. The CNWP argues that any new party must be broad, involving trade union activists, socialists, anti-capitalist young people, and community, anti-war and environmental activists.