Complex sentence: Nobita and the rest of the group prepare to return to their own time although a tearful farewell is first said to Pega, Draco and Gri-because they are fantastical animals, they cannot accompany Nobita and must be moved to a zoo.
Split into simpler sentences: Nobita and the rest of the group prepare to return to their own time although a tearful farewell is first said to Pegasus. Dragon and Griffin-because they are fantastical animals, they cannot accompany Nobita and must be moved to a zoo.