Complex sentence: Ian Robert Maxwell MC (10 June 1923--5 November 1991) was a Czechoslovakian-born British media proprietor and former Member of Parliament (MP), who rose from poverty to build an extensive publishing empire.
Split into simpler sentences: Ian Robert Maxwell MC (10 June 1923--5 November 1991) was a Czechoslovakian-born British media proprietor and Member of Parliament (MP). He rose from poverty to build an extensive publishing empire.