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Ordered that the order is affirmed insofar as appealed from, with one bill of costs.
The defendants satisfied their initial burden on those branches of their separate motions which were for summary judgment dismissing the amended complaint insofar as asserted against them by demonstrating that the injured plaintiff was unable to specifically identify the cause of his fall on a stairway. In response, the plaintiffs failed to submit evidence in admissible form sufficient to raise a triable issue of material fact (see Zuckerman v City of New York,
