Once, there was a girl called Sophia and she was riding her bike. She stopped to look at a pond, so she tied her bike to a tree, and then walked down to see the pond. The pond was very big and full of tadpoles. When it was time to go home, Sophia forgot that she had taken her bike with her, so she walked home to have tea with her bike still tied to the tree. When someone else came to the pond, then they saw the bike and said whose bike is this? Where did it come from?