Complex sentence: In the mid 15th century, Palden Sangpo continued the monastic work started by his teacher, Sherab Sangpo, decided to build a larger monastery here, dictated by an unusual event that occurred while choosing the site for the monastery.
Split into simpler sentences: In the mid 15th century, Palden Sangpo continued the monastic work started by his teacher, Sherab Sangpo. He decided to build a larger monastery here that was dictated by an unusual event that occurred while choosing the site for the monastery.