User talk:Prof Petterson

March 2018
Hello, I'm Wikipelli. I wanted to let you know that I reverted one of your recent contributions —specifically this edit to Penicillin— because it 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. Wikipelli Talk  20:24, 20 March 2018 (UTC)