Complex sentence: American colonists initially objected to the Sugar Act for economic reasons, but before long they recognized that there were constitutional issues involved guaranteed that British subjects could not be taxed without their consent, which came in the form of representation in Parliament.
Split into simpler sentences: American colonists initially objected to the Sugar Act for economic reasons, but before long they recognized that there were constitutional issues involved. The British Constitution guaranteed that British subjects could not be taxed without their consent, which came in the form of representation in Parliament.