Complex sentence: Although the Liberals lost a small share of the popular vote, they were able to win more seats, but fell just short of having a majority forcing them to rely on the New Democratic Party and occasionally other smaller opposition parties in order to remain in power.
Split into simpler sentences: Although the Liberals lost a small share of the popular vote, they were able to win more seats, but fell just short of having a majority. In order to govern, the Liberals relied on the New Democratic Party, and occasionally other smaller opposition parties in order to remain in power.