Anchor: A band, including some guitarists and a drummer, performs on a stage.
Entailed: A band with a guitarist and drummer performing on a stage indoors.
Contradiction: A band with no drummer practicing inside their garage.
Contradiction: There are no less than five billion per year.
Contradiction: a goup of eats outside
Contradiction: They do very well for themselves. 
Contradiction: One man tickled the other.