Simplify the following text for a Grade 8 native English-speaking person.
Original: Having first sent his manuscripts out of the country , BartÃ k felt he had to emigrate to the USA with Ditta PÃ sztory .
Simplified: Having first sent his manuscripts out of the country , BartÃ k reluctantly emigrated to the U.S. with Ditta PÃ sztory in July that year .