Complex sentence: In February 2014, McKenna found employment as a grocer's boy, before working as a Vaccination Officer for the West Derby Union, which was responsible for the upkeep of the Liverpool workhouses at the time.
Split into simpler sentences: In February 2014, McKenna found employment as a grocer's boy before working as a Vaccination Officer for the West Derby Union. This organization was responsible for the upkeep of the Liverpool workhouses at the time.