Task: Question Answering
Input (English): My sons and I were invited by their grandmother to come for a visit . We decided to fly across the country . We went to the airport and purchased plane tickets . Then we went home and packed our suitcases . The next day we took a cab to the airport and hour early . We went to the airlines check in area an waited in line to show our tickets , get our seat assignments and check out bags . The we headed upstairs to the airplane gate . There were many people flying on this plane and the waiting room was crowded . Then the plane pulled in next to the gate and the flight attendant started calling people over to board the plane . We were near last to get on the plane . Once on the plane we found our seats and sat down . After the plane took off the stewardess did a demonstration about how to use the emergency exits . Then we sat back and flew all the way to Reno , NV where we were picked up from the airport by grandma . 
Question: Who is flying with them Today?
Output (English): their sons