Complex sentence: In 1912, the Ontario government passed Regulation 17, which restricted the use of French language instruction to a minimum-legislation that outraged Quebec and was an irritant to national unity during the First World War.
Split into simpler sentences: In 1912, the Ontario government passed Regulation 17, which restricted the use of French language instruction to a minimum. This legislation outraged Quebec, and was an irritant to national unity during the First World War.