Anchor: The rugged island of Sardinia deserves at least a week to do it justice, but you may want to spend a long weekend at one of its attractive little seaside resorts.
Entailed: You need to spend a week in Sardinia when you visit. 
Contradiction: You only need to spend a day in Sardinia to get its full flavor. 
Contradiction: The swimmers are in murky water.
Contradiction: Students like activities at their school.
Contradiction: There was no way the responses could be categorized.
Contradiction: There is a man holding a flag.