Anchor: However, most of the studies examined by Ito and Thurston only controlled for PM10 or broader measures of particles and did not directly control for PM2.
Entailed: Most of the studies did not directly control for PM2.
Contradiction: No studies controlled for PM10.
Contradiction: The headmistress still works at the school. 
Contradiction: People getting wet.
Contradiction: INS figured out that criminal aliens could be apprehended for only $10 million.
Contradiction: The British fought the Chinese with superior weapons and tactics.