Text: Each of their four stomachs is a breeding ground for the virulent E. coli bacteria, which is estimated to infect between 2 percent and 4 percent of U.S. livestock.
Entailment: E.coli bacteria infects a small percentage of the U.S. livestock.
Contradiction: E. coli bacteria is estimated to infect between 4 and 6 percent of the U.S. livestock.