Simplify the following text for a Grade 8 native English-speaking person.
Original: Marcus Cocceius Nerva ( 8 November 30 â `` 27 January 98 ) , commonly known as Nerva , was Roman Emperor from 96 to 98 .
Simplified: Nerva ( Marcus Cocceius Nerva , 8 November 30 â `` 25 January 98 ) was Roman Emperor from 96 to 98 .