Complex sentence: He is also a writer and speaker; piano accompanist; activist and radio presenter; he has written for a range of publications and for several years contributed a weekly column on the arts to left-wing newspaper "The Morning Star".
Split into simpler sentences: He is also a speaker, piano accompanist, activist and radio presenter, and he has written for a range of publications. For several years he contributed a weekly column on the arts to the left-wing newspaper "The Morning Star".