What is the test for a plaintiff to prove negligence under a theory of premises liability?

In order to prove defendant's negligence under a theory of premises liability, plaintiff must demonstrate that: (1) the premises were not reasonably safe; (2) defendant either created the dangerous condition which caused plaintiff's injuries or had actual or constructive notice of the condition and; (3) defendant's negligence in allowing the unsafe condition to exist was a substantial factor in causing plaintiff's injury (Schwartz v. Mittelman, 220 AD2d 656 [2d Dept 1995]).