A young woman wearing a black tank top is listening to music on her MP3 player while standing in a crowd .
It is certain that a young woman is listening to her favorite band while waiting for them to come on stage .
It is highly unlikely that a young woman is listening to her favorite band while waiting for them to come on stage .
It is certain that a young woman is listening to her favorite band while waiting for them to come on stage .
A young woman is listening to her favorite band while waiting for them to come on stage .