Simplify the following text for a Grade 8 native English-speaking person.
Original: The House of Romanov was the second and last imperial dynasty to rule over Russia , reigning from 1613 until the February Revolution abolished the crown in 1917 .
Simplified: The House of Romanov was the second and last imperial dynasty to rule over Russia . It ruled from 1613 until the February Revolution took away the crown in 1917 .