Anchor: Costumed riders are riding saddled and bridled horses walking through tall green grasses.
Entailed: There are costumed riders on horses outdoors.
Contradiction: There are costumed people riding lawnmowers in a field.
Contradiction: Savings could not be had by looking at sample error rates. 
Contradiction: A young female in pink and green is swimming with a rubber ring.
Contradiction: The dogs are inside the house.
Contradiction: A man sits at the shore and attends to a fishing rod while a woman and young  girl stands next to him