Simplify the following text for a Grade 11 native English-speaking person.
Original: Her performance in Tokyo Kiddo ( 1950 ) , in which she played a street orphan , made her symbolic of both the hardship and the national optimism of post-World War II Japan .
Simplified: Her performance in Tokyo Kid ( 1950 ) , in which she played a street orphan , made her symbolic of both the hardship and the national optimism of post-World War II Japan .