Task: Question Generation
Input (English): Passage: Doug is a flight instructor and owner of a pilot school. He, his wife Abby and their two daughters, Lindsay and Amanda face serious financial problems, as they are near financial ruin, and need $300,000 to expand the pilot school. 
Doug has to work hard and has hardly any time for his family, even arriving at home late on Christmas Eve. During the meal Doug receives a phone call from a lawyer who informs him that his parents are not his biological parents, but that he was adopted by an open adoption by them. The lawyer asks him to come to a meeting, where problems concerning his biological father are to be discussed.
The lawyer introduces him to his half sister, Delilah, who was disowned from their father. Her only interest is to have her father judged unfit in order to sell his property. The lawyer asks whether they want to look after the property and their father. If they would, they would also take responsibility of him. Doug decides to do so without asking Abby.
Output (English): Who is informed that his parents are not his biological parents?