faf2d5ae_ors__Part_1___456_Berea_Street_iew_of_CSS_2_1_selector_syntax_Description
[Selector type] The :first-child pseudo-class [Pattern] E:first-child [Description] 
Matches element E when E is the first child of its parent.
CSS 2.1 selectors, Part 1 | 456 Berea Street
Description