Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: Portuguese police investigating the disappearance of British girl Madeleine McCann are to question former suspect Robert Murat, the BBC has learned.

Madeleine McCann: Robert Murat 'facing questions as witness'