Original sentence: A Conservative-held three-way marginal throughout the 1980s, in recent years this constituency has become a race between Labour and the Liberal Democrats.It has a large student population which seems to have helped Labour to win in 1992 and 1997 but thereafter increasingly switched to the Liberal Democrats due to opposition to government plans for reforming student support.The Liberal Democrats won the Welsh Assembly seat in 1999 and 2003, and also dominate the wards which make up the seat in elections to Cardiff City Council.The seat is unchanged in the Fifth Periodical Report of the Parliamentary Boundary Commission for Wales
Edited sentence: A three-way marginal throughout the 1980s, in recent years this constituency has become a race between Labour and the Liberal Democrats.It has a large student population and Labour were on the slippery slope to losing the seat even before their controversial student loan/top-up fees policy, heavily derided by most students.The Liberal Democrats won this constituency's Welsh Assembly seat in 1999 and 2003, and are also the largest group on Cardiff City Council