Simplify the following text for a Grade 12 native English-speaking person.
Original: In April 1908 , Mandelstam decided to enter the Sorbonne in Paris to study literature and philosophy , but he left the following year to attend the University of Heidelberg in Germany .
Simplified: In April 1908 Mandelstam decided to enter the Sorbonne to study literature and philosophy , but he left the following year to attend the University of Heidelberg .