Anchor: People listen to two men play guitar on a boat.
Entailed: Live music is being played on that boat
Contradiction: The drums add a nice sound to the 2 guitars
Contradiction: Two women are fixing a roof.
Contradiction: The authors of the text were stunned at how illegal this all was.
Contradiction: 11 billion increase in total electric generation expenditures. 
Contradiction: He will be up for election in three months.