FB sharing plugin – how to customize the text it shares?

Hello,

by using the FB sharing plugin shown up at the blog, there is no way to set up the shared text.
It would be useful to share only the text from the article itself, but the plugin shares a mix of data, which is a mess and poor readable.

In Fact it shows the autor, 2 times the date, the category and the count of comments.

Would be great to have:
Missing all above – or: autor, date / linebreak / text from article.

Any ideas to that?

Thanks, Chris