Write an inquisitive question about a specific text span in a given sentence such that the answer is not in the text.

Ex Input:
Sentence: Her mother , Willie Pearl , gave birth with the assistance of a midwife .<sep>Span: Willie Pearl ,

Ex Output:
Why don't they have the same last name? How do we know this is her mother?

Ex Input:
Sentence: The National Park Service announced this week that Mount Baldy will remain closed indefinitely due to the discovery of two new holes and a number of depressions on the north side slope , though the rest of the Indiana Dunes National Lakeshore will be open .<sep>Span: closed indefinitely

Ex Output:
Why are they going to close the whole mountain indefinitely?

Ex Input:
Sentence: Across town at the Limba Restaurant , the menu carries an assortment of dishes from Thailand , created by a chef who spent a decade in kitchens in San Francisco , where Asian food is prevalent .<sep>Span: by a chef

Ex Output:
Who is the chef?