A group of middle-aged women stand at a bus stop ; two of the women prepare to board the bus .
It is highly likely that a group of middle-aged women are on an escalator in a shopping mall .
It is impossible that a group of middle-aged women are on an escalator in a shopping mall .
It is highly likely that a group of middle-aged women are on an escalator in a shopping mall .
A group of middle-aged women are on an escalator in a shopping mall .