Complex sentence: The Homeland Security Council (HSC) is an entity within the White House Office tasked with advising the President on matters relating to Homeland Security, the current Homeland Security Advisor is John Brennan who holds the rank of Assistant to the President for Homeland Security and Counterterrorism.
Split into simpler sentences: The Homeland Security Council (HSC) is an entity within the White House Office tasked with advising the President on matters relating to Homeland Security. The current Homeland Security Advisor is John Brennan who holds the rank of Assistant to the President for Homeland Security and Counterterrorism.