Anchor: The profitability of rubber has declined somewhat, but tin has continued as an important source of income.
Entailed: Tin remains profitable.
Contradiction: Rubber's profitability is rising.
Contradiction: The people are swimming in a pool.
Contradiction: A dog bites a man.
Contradiction: Some people are in a yatch.
Contradiction: There was 16th-century masonry at the bottom of a river.