Complex sentence: In 1893 the college published its first catalog, which urged Czech parents to enroll their 13-year-old boys and described the academic curriculum, which included a preparatory year to teach elementary school subjects to remedial students.
Split into simpler sentences: In 1893 the college published its first catalog, which urged Czech parents to enroll their 13-year-old boys. The academic curriculum included a preparatory year to teach elementary school subjects to remedial students.