Simplify the following text for a Grade 9 native English-speaking person.
Original: The authors com from the Sil Valley , specially from El Bierzu ( LliÃ n ) , and it is the collective book in the Leonese language where there are more authors .
Simplified: The authors com from the Sil Valley , specially from El Bierzu and it is the collective book in the Leonese language where there are more authors .