Simplify the following text for a Grade 7 native English-speaking person.
Original: The vice president sometimes assumes some of the ceremonial duties of the president , such as attending functions and events that the actual president may be too busy to attend ; the Vice President of the United States , for example , often attends funerals of world leaders on behalf of the President .
Simplified: A vice president also takes over if the president is no longer able to conduct his or her duties . In the United States , the current Vice President is Joe Biden .