Complex sentence: Meanwhile, his then fiancée Floor Jansen was writing the lyrics and shaping up the plot for the concept album, following the indications of Gommans, who had first hand knowledge of the lives of problematic children, thanks to his job as a teacher.
Split into simpler sentences: Meanwhile, his then fiancée Floor Jansen was writing the lyrics and shaping up the plot for the concept album. She followed the indications of Gommans, who had first hand knowledge of the lives of problematic children, thanks to his job as a teacher.