Text: Moreover, recent findings also suggest that nitrogen is quantitatively as important or, in some areas, possibly more important than sulfur as a cause of episodic acidification because of short-term acidic pulses occurring during the most biologically sensitive time of the year, when fish reproduce.
Entailment: Nitrogen may be more responsible for acidification than sulfur.
Contradiction: Recent findings show that nitrogen has no impact compared to sulfur on episodic acidification.