Complex sentence: Hosek moved on to federal politics becoming director of the national Liberal caucus research bureau and was co-author with Paul Martin of the "Red Book" as the party's campaign platform for the 1993 Canadian election was known.
Split into simpler sentences: Hosek moved on to federal politics, becoming director of the Liberal Party of Canada's caucus research bureau. Along with Paul Martin, she co-authored the party's "Red Book", as the party's campaign platform for the 1993 Canadian election was known.