Anchor: a large group of people working together to build a small structure at a small construction site.
Entailed: A group of people are gathered to work on a construction project.
Contradiction: A group of people are building a rocket.
Contradiction: People are competing in a swimming competition.
Contradiction: Two people are going down a river.
Contradiction: I never went.
Contradiction: The boilermakers have saw an increase in their memberships in two years with a rate of almost seven percent.