Anchor: Dave tried to crawl out, but something held him back.
Entailed: Dave was held back.
Contradiction: Dave freely moved on. 
Contradiction: I think I'd be fine with it now, since it never really has taken a lot out of me. 
Contradiction: they would fight every third stop.
Contradiction: Its raining out so the people are inside not eating.
Contradiction: Nobody will care that much.