Complex sentence: As the Republican Party nominee for Vice President in the 2008 presidential election alongside Arizona Senator John McCain, she was the first Alaskan on the national ticket of a major party and first Republican woman nominated for the vice presidency.
Split into simpler sentences: As the Republican Party nominee for Vice President in the 2008 presidential election (alongside Arizona Senator John McCain). In the election she was the first Alaskan on the national ticket of a major party and the first Republican woman nominated for the vice presidency.