Anchor: REMSAD was also used to estimate the changes in visibility and deposition of mercury, nitrogen, and sulfur.
Entailed: REMSAD has been used to find evidence of mercury, nitrogen, and sulfur.
Contradiction: Mercury, nitrogen and sulfur are not earth elements. 
Contradiction: Sharon antagonized the Russian Prime Minister.
Contradiction: The laughter and applause came from the three guys sitting down.
Contradiction: a bike race is happening in the park
Contradiction: Tommy tiredly stated that death is an option.