Anchor: The actual annual requirement for labor would be less if the estimated number of retrofit installations were evenly distributed over the full five-year increment of time instead of the conservative three-year increment.
Entailed: The requirement for labor would change if installations happened less often.
Contradiction: Having installations every five years or every three years does affect labor costs.
Contradiction: A bride, groom, and friends are playing a basketball game.
Contradiction: Then came the three.
Contradiction: Emperor Justinian and his Empress, Theodora, were anything but formal. 
Contradiction: A crowd of people is outdoors.