Complex sentence: The 1956 Pipeline Debate led to the widespread impression that the Liberals had grown arrogant in power when the government invoked closure on numerous occasions in order to curtail debate and ensure that its Pipeline Bill passed by a specific deadline.
Split into simpler sentences: The 1956 Pipeline Debate led to the widespread impression that the Liberals had grown arrogant in power. On numerous occasions, the government invoked closure in order to curtail debate and ensure that its Pipeline Bill passed by a specific deadline.