Can you give me a sentence for the word challenge?

Here are some example sentences using the Word 'challenge':

John's biggest health challenge was to lose 75 pounds.

John's wife, Mary, challenged him to lose 25 pounds within six months.

Physician's Health Awareness Challenge program was advertised in every large newspaper nationwide.

Chronically ill patients and disabled patients face many challenges every day.

Society must challenge politicians to pass health care legislation.