what were all the days?
28 august 2000, 9 april 2001, 16 april 2001, 15 october 2002, 5 november 2002, 14 april 2003, 27 april 2009, 1 june 2009
for these, what were the surfaces used?
clay, clay, hard, hard, hard, clay, clay, grass
of these, which were grass?
grass
what was the day corresponding to this surface?
1 june 2009