Simplify the following text for a Grade 7 native English-speaking person.
Original: The emblem of Yorkshire is the white rose of the English royal House of York , and the most commonly used flag representative of Yorkshire is the White Rose on a dark blue background , which after years of use , was recognized by the Flag Institute on 29 July 2008 . Yorkshire Day , held on 1 August , is a celebration of the general culture of Yorkshire , ranging from its history to its own dialect .
Simplified: It is now split up into four divisions , the East Riding of Yorkshire , North Yorkshire , South Yorkshire and West Yorkshire .