Simplify the following text for a Grade 9 native English-speaking person.
Original: During the mid 1990s , Hill was Michael Schumacher 's main rival for the Formula One Driver 's Championship , finishing runner-up in the German 's 1994 and 1995 title seasons .
Simplified: During the mid 1990s , Hill was Michael Schumacher 's main rival for the Formula One Drivers ' Championship .