User talk:1.209.107.67

Hello, I'm David Eppstein. I wanted to let you know that one or more of your recent contributions to Katherine Johnson have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the help desk. Thanks. —David Eppstein (talk) 06:01, 27 September 2019 (UTC)

November 2020
Hello, and welcome to Wikipedia. This is a message letting you know that one or more of your recent edits to Electric charge has been undone by an automated computer program called ClueBot NG.

Thank you. ClueBot NG (talk) 00:46, 18 November 2020 (UTC)
 * ClueBot NG makes very few mistakes, but it does happen. If you believe the change you made was constructive, please read about it, [ report it here], remove this message from your talk page, and then make the edit again.
 * For help, take a look at the introduction.
 * The following is the log entry regarding this message: Electric charge was changed by 1.209.107.67 (u) (t) ANN scored at 0.976597 on 2020-11-18T00:46:14+00:00