Anchor: It will only take a moment for the shaft to collapse so run to the main chamber as soon as you break the barrels.
Entailed:  It would not take long to collapse.
Contradiction: Nothing would collapse, and the barrels were inert.
Contradiction: The girls are watching a movie.
Contradiction: a woman took her shoe off
Contradiction: Jockeys are racing their pigs on the green field.
Contradiction: the man is playing the guitar