You should be able to write the research question in a simple sentence.

Let me know how you get along understanding that simple sentence.

Then she read the few simple sentences and said that they were wonderful.

Do I have to put it in short, simple sentences?

The biggest mistake I have seen is that people do not use short simple sentences.

Does it take you a very long time to say a simple sentence in public?

Yet virtually all children understand scores of words and can speak simple sentences by the time they are 3 years old.

His books are characterized by a clear writing style using simple, short sentences.

This might explain why reading a simple sentence brought tears to my eyes.

It seemed to have more meaning than a simple sentence.