Complex sentence: Following the 2013 elections, Steinmeier became the first prominent member of the Social Democrats to be confronted with allegations that he plagiarized parts of his 1991 doctoral dissertation about the role of the state in the prevention of homelessness.
Split into simpler sentences: Following the 2013 elections, Steinmeier became the first prominent member of the Social Democrats to be confronted with allegations that he plagiarized parts of his doctoral dissertation. It was written in 1991 and explored the role of the state in the prevention of homelessness.