Complex sentence: Members of the Press Gang collective trained themselves in the use of printing equipment and graphic design; they also participated in campaigns and community-based movements for social change: feminist, anti-capitalist, and anti-imperialist.
Split into simpler sentences: Members of the Press Gang collective trained themselves in the use of printing equipment and graphic design. They also participated in campaigns and community-based movements for social change: feminist, anti-capitalist, and anti-imperialist.