The question you're referring to asks "Have you ever before filed a petition for this or any other alien?" Based on your facts, you seem to already know the answer to this question.
The above information does not constitute legal advice, and is intended only as general information. You should speak with an attorney to discuss your individual case, as not all facts are known at this time.
Mark yes and provide the information requested. It is always a good idea to get your application reviewed by an attorney even if you don't retain one to file it for you. Hope this helps.