这个签名很有价值，因为他是一个在棒球史和非裔美国人历史上值得纪念的人物。
This autographv is worth a lot because he's such a memorable figure in baseball and African-American history.
他认为一个特殊的节日可以帮助非裔美国人实现他们的目标，即建立强大的家庭、了解他们的历史、创造团结感。
He believed that a special holiday could help African-Americans meet their goals of building strong families, learning about their history, and creating a sense of unity.
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