A girl in green with glittery fairy wings holds a woman 's hand as they walk down a path in a park .
There is a very good chance that a girl is trick-o-treating , but has stopped to help an old lady to get out of the park .
It is impossible that a girl is trick-o-treating , but has stopped to help an old lady to get out of the park .
There is a very good chance that a girl is trick-o-treating , but has stopped to help an old lady to get out of the park .
A girl is trick-o-treating , but has stopped to help an old lady to get out of the park .