animate.css

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css" />

  <link href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.0.0/animate.min.css" rel="stylesheet">

animation: name duration timing-function delay iteration-count 
direction fill-mode play-state;

article {
    animation-name            : displaceContent;
    animation-duration        : 1s;
    animation-delay           : 4s;
    animation-iteration-count : 1;
    animation-fill-mode       : forwards;
}
@keyframes displaceContent {
    from { transform : translateY(0em) }
    to   { transform : translateY(3em) } /* slide down to make room for advertisements */
}