Complex sentence: Saint Adalbert (Vojtech, 10th century) son of the White-Croatian prince Slavnik, was spreading Christianity, education and culture, and to this end founded the benedictine monastery in Brevnov in 993.
Split into simpler sentences: Saint Adalbert (Vojtech, 10th century) was a descendant of the White Croats, son of the White-Croatian prince Slavnik. He was spreading Christianity, education and culture, and to this end founded the benedictine monastery in Brevnov in 993.