Anchor: The train worker checks to make sure that everything is okay before the train leaves the station.
Entailed: There is a worker working.
Contradiction: The train worker doesn't check anything.
Contradiction: The prefecture offices in Florence are not patterned after any particular style.  
Contradiction: A man speaks to people at a party.
Contradiction: The best students were the ones that couldn't remember anything at all. 
Contradiction: A child draws int he beach sand while another stands in the water.