Anchor: In return, the vice president occasionally helps them.
Entailed: The vice president will help them from time to time.
Contradiction: The vice president has never helped them in return.
Contradiction: That is horribly done.
Contradiction: I researched on schools specialising in engineering, which was my intended direction. 
Contradiction: A group of runners competes in the 10k race.
Contradiction: The woman is on her porch.