An old asian woman is sitting in front of a subway train and passengers are walking by her .
It is probably the case that an old woman sits in front of a subway so she can get aboard it .
It is probably the case that an old woman sits in front of a subway so she can get aboard it .
It is unlikely that an old woman sits in front of a subway so she can get aboard it .
An old woman sits in front of a subway so she can get aboard it .