Anchor: The real concern is that because Microsoft's victory in an earlier derby happens to have given it control over a particularly strategic part of the industry--because it supplies operating systems--it is in a position to squeeze out rival suppliers of other software.
Entailed: Microsoft was in a position of power over their rivals.
Contradiction: Microsoft folded under the pressure of their competitors. 
Contradiction: Two dogs are playing with a cat.
Contradiction: A young woman is playing with a soccer ball.
Contradiction: The man is painting a bowl of fruit.
Contradiction: People are congregating in an area.