array(4) { [0]=> string(68) "springer\Machine Learning for Predicting Cognitive Diseases_ Methods" [1]=> string(34) " Data Sources and Risk Factors.pdf" [2]=> string(8) " 1333842" [3]=> string(21) " 2020-09-16 10:13:3 " } array(4) { [0]=> string(79) "springer\New folder\Machine Learning for Predicting Cognitive Diseases_ Methods" [1]=> string(34) " Data Sources and Risk Factors.pdf" [2]=> string(8) " 1820325" [3]=> string(21) " 2020-09-18 13:56:4 " }