Complex sentence: The 2013 UK higher education strike is industrial action taking place on 31 October 2013 that has been jointly co-ordinated by the UCU, Unite, and UNISON trade unions across the United Kingdom.
Split into simpler sentences: The 2013 UK higher education strike was industrial action which took place on 31 October 2013. It was jointly co-ordinated by the UCU, Unite, and UNISON trade unions across the United Kingdom.