Task: Question Generation
Input (English): Context: Brianne spent some time at Sun & Fun pool with Molly . Molly then asked to spend the night last night but at about 11:30PM her tummy started to hurt and she wanted to go home . I dropped her off at her house . Today , Devon and Trevor are going to Jam week festivities at White Oak camp . They got to have a water fight and do some swimming .
Output (English): What may be the reason why her tummy started to hurt ?