Simplify the following text for a Grade 9 native English-speaking person.
Original: Influenced by both Mahatma Gandhi 's philosophy of non-violence and by more specifically Buddhist concepts , Aung San Suu Kyi entered politics to work for democratization , helped found the National League for Democracy on 24 September 1988 , and was put under house arrest on 20 July 1989 .
Simplified: Aung San Suu Kyi tried to work for democracy and helped make the National League for Democracy on 27 September 1988 .