Kempton Mares' Hurdle
Winners
Table:
Year

Winner

Age

Jockey

Trainer

2007

Refinement

8

Tony McCoy

Jonjo O'Neill

2008

One Gulp

5

Dominic Elsworth

Paul Webber

2009

Whiteoak

6

Jason Maguire

Donald McCain

2010

Carole's Legacy

6

Barry Geraghty

Nicky Henderson

2011

Whoops A Daisy

5

Barry Geraghty

Nicky Henderson

2012

Knockfierna

7

Davy Russell

Charles Byrnes

2013

Highland Retreat

6

Noel Fehily

Harry Fry

2014

Carole's Spirit

6

Daryl Jacob

Robert Walford

2015

Morello Royale

5

Aidan Coleman

Colin Tizzard

2016

Surtee Du Berlais

6

Leighton Aspell

Oliver Sherwood

2017

La Bague Au Roi

6

Richard Johnson

Warren Greatrex

2018

Mia's Storm

8

Wayne Hutchinson

Alan King

Referring to the following table concerning 'Kempton Mares' Hurdle' (see 'Winners'), formulate a single-sentence overview of the highlighted cells and format it within the following JSON object {"answer": "YOUR ANSWER"}.