CSS ':hover'

When the elements in the table are hovered, the result should be according to the reference in the last row.
		Combinator
		None	Descendant	Child	Child+Sibling
First selector	Universal	PSpan Span	PSpan Span	PSpan Span	PSpan Span
	Type	PSpan Span	PSpan Span	PSpan Span	PSpan Span
	Id	PSpan Span	PSpan Span	PSpan Span	PSpan Span
	Class	PSpan Span	PSpan Span	PSpan Span	PSpan Span
Reference		PSpan Span	PSpan Span	PSpan Span	PSpan Span