Sample research questions, beginning level

Biography project on famous frenchies. My students have chosen a topic.  They registered on the research project calculator.  they began to write research questions.  they have recorded 8-10 facts in French.  They are about to research in depth their research questions, which is step 2 "Gather information".

I am concerned about the quality of their research questions.  Wondering where we could find a list of examples of good, simple research questions from ??  middle school science fair/history day projects.  Does any one have any suggestions??