Complex sentence: The Student Organisation of The University of Ljubljana (SOU of Ljubljana) is a democratically organized community, which represents the interests of students and is committed to achieving them, and to ensure the quality of teaching and a varied and high quality student life.
Split into simpler sentences: The Student Organisation of The University of Ljubljana (SOU of Ljubljana) is a student organization. It represents the interests of students, and advocates for high-quality teaching and a varied and high quality student life.