Complex sentence: By the late 1980s the union began to lose its charisma to students and a study done in 1986 found that about $10 million would need to be added by 1994 to fix the plumbing, roofing and heating system in the union.
Split into simpler sentences: By the late 1980s the Union began to lose its charisma to students. Also, a study done in 1986 found that about $10 million would need to be added by 1994 to fix the plumbing, roofing and heating system in the union.