Complex sentence: Jean Gerson's "L'ABC des simples gens" was an important catechetical work published at the advent of the printing press, which along with Gerson's other catechetical works recognized the unique problems of teaching the faith to children.
Split into simpler sentences: Jean Gerson's "L'ABC des simples gens" was an important catechetical work published at the advent of the printing press. Along with Gerson's other catechetical works, it addressed the unique problems of teaching the faith to children.