Mr is a contaction, not an abbreviation, so it shouldn't have a period at the end. Ditto for Ms, Mrs, Dr and Pr (for Professor). When Adventuron sees the period, it thinks it's the end of the sentence. In case you didn't realise it, you can type multiple sentences on one line. So, Adventuron sees this as TALK TO MR, followed by MAPLE. It acts on the first sentence, then tells you that 'The game does not require use of the word "maple".', as maple is not a verb that it recognises. The solution is to correct your English and not use "Mr." in your text so that you don't give players a false impression of what the game expects. Other than that, I can't think of a simple solution.