Simplify the following text for a Grade 7 native English-speaking person.
Original: Joseph Robinette `` Joe '' Biden , Jr. ( ; born November 20 , 1942 ) is the 47th and current Vice President of the United States , serving under President Barack Obama .
Simplified: Joseph Robinette Biden , Jr. ( born November 20 , 1942 ) is the 47th and current Vice President of the United States .