Anchor: yeah that's pretty interesting because just just because you know a subject matter doesn't mean you can teach it
Entailed: Knowing about something and teaching something are two different things. 
Contradiction: I can't teach history because I don't know anything about it. 
Contradiction: A bunch of girls are eating lunch.
Contradiction: More than one person is playing baseball.
Contradiction: People are inside because it is snowing.
Contradiction: The dog is outside in a field.