Anchor:  In the 19th and early 20th centuries, Spain was both economically weak and politically unstable.
Entailed: Spain was not strong economically or politically.
Contradiction: Spain had a strong economy and stable political structure.
Contradiction: Istanbul is exclusively made up of wealthy inhabitants.
Contradiction: Developing countries need a stable trading system.
Contradiction: Penguins eat dog food.
Contradiction: yes, equally fast