Complex sentence: The nationalist movement in Iceland sprung out of Romantic literary ideas of the Enlightenment and as such nationalistic ideas where originally expressed in the literature of the time and later to be involved in political events of the country.
Split into simpler sentences: The nationalist movement in Iceland sprung out of Romantic literary ideas of the Enlightenment and as such nationalistic ideas where originally expressed in the literature of the time. These ideas would later be involved in political events of the country.