Complex sentence: In 1914, while Wagner remained President pro tem, John F. Murtaugh was chosen Majority Leader of the State Senate, the only time before 2009 that the two offices were not held by the same person.
Split into simpler sentences: In 1914, while Wagner remained President pro tem, John F. Murtaugh was chosen Majority Leader of the State Senate. This was the only time before 2009 that the two offices were not held by the same person.