Anchor: Commercial sites comprise only a fraction of online meteorology.
Entailed: Commercial sites contain online meteorology, although it is only a fraction.
Contradiction: Commercial sites contain online meteorology, but not just a fraction.
Contradiction: Two men are sitting in the ice rink
Contradiction: They are engaged by the games
Contradiction: A red-haired woman is riding a bike
Contradiction: The woman in the swimming pool was wet