Simplify the following text for a Grade 10 native English-speaking person.
Original: The name AsniÃ res was recorded for the first time in a papal bull of 1158 as Asnerias , from Medieval Latin asinaria , meaning `` donkey farm '' .
Simplified: The name AsniÃ res was first mentionned in 1158 as Asnerias , from Medieval Latin asinaria , meaning `` donkey farm '' .